Abstract
Background
The prognosis of cirrhosis is clearly stratified by liver function. Although direct-acting antiviral (DAA) has recently been used to eliminate hepatitis C virus (HCV), it is not clear whether liver function stratifies the prognosis of decompensated cirrhotic patients treated with DAA.
Methods
A total of 206 HCV-associated decompensated cirrhotic patients who started DAA from February 2019 to December 2021 at 31 Japanese hospitals were prospectively registered.
Results
The median age was 68, and the proportions of patients with Child–Pugh class A (CP-A), CP-B and CP-C were 10% (20/206), 76% (156/206) and 15% (30/206), respectively. Twenty-six patients died, and two patients underwent liver transplantation (LT); the 2- and 3-year LT-free survival rates were 90.0% and 83.2%, respectively. We examined factors associated with LT-free survival using 2 models including either CP class (Model 1) or MELD score (Model 2). In multivariate Cox proportional hazard analysis, CP class at 12 weeks after the end of treatment (EOT) in Model 1 and MELD score at 12 weeks after the EOT in Model 2 were significant factors, while baseline CP class or MELD score was not. Two-year LT-free survival rates were 100%, 91.6% and 60.4% for patients with CP-A, CP-B and CP-C at 12 weeks after the EOT and 95.2% and 69.6% for patients with MELD < 15 and MELD ≥ 15 at 12 weeks after the EOT, respectively.
Conclusions
The prognosis of decompensated cirrhotic patients receiving DAA was stratified by liver function at 12 weeks after the EOT, not by baseline liver function.
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Introduction
The prognosis of patients with liver cirrhosis is clearly stratified by liver function [1, 2]. A recent Japanese study that included 444 cirrhotic patients with various etiologies reported that the 3- and 5-year survival rates were 74.4% and 61.1% for patients with Child–Pugh class A (CP-A), 58.5% and 42.4% for those with CP-B and 37.3% and 24.9% for those with CP-C, respectively [2]. Even in studies limited to hepatitis C virus (HCV)-associated decompensated cirrhosis, survival rates significantly decreased according to liver function [3,4,5]. Planas et al. reported that the 5-year survival rates were 69.6%, 46.3% and 36.4% for patients with CP-A, CP-B and CP-C, respectively [3]. Thus, liver function is a strong prognostic factor for patients with liver cirrhosis.
With the recent introduction of direct-acting antiviral (DAA) treatment, HCV can be eliminated in approximately 90% of patients with decompensated cirrhosis. HCV elimination improves liver function in the short term even in patients with decompensated cirrhosis [6,7,8,9,10,11]. However, it is not clear how strongly baseline liver function determines the prognosis of decompensated cirrhotic patients treated with DAA.
The aim of this study was to evaluate the impact of baseline liver function on the prognosis of patients with decompensated cirrhosis who underwent DAA treatment.
Methods
Study patients
This multicentre observational study was performed at Osaka University Hospital and 30 other hospitals in Japan. A total of 206 consecutive HCV-associated decompensated cirrhotic patients who initiated DAA treatment between February 2019 and December 2021 at each hospital were prospectively registered. No exclusion criteria were set. Decompensated cirrhosis was defined as CP-B or CP-C or CP-A with previous decompensating events according to our previous reports [6, 12].
The institutional review board (IRB) at each participating hospital approved the protocol of this study (IRB No. 18431), and this study was performed in accordance with the Declaration of Helsinki as amended in 2013. In principle, informed consent was obtained from participating patients through an opt-out method. We registered this study with the University Hospital Medical Information Network (UMIN36150).
Antiviral treatment and virologic response
All patients were treated with sofosbuvir plus velpatasvir (SOF/VEL) for 12 weeks according to the HCV guidelines in Japan [13]. Sustained virologic response (SVR) was defined as undetectable serum HCV RNA at 12 or 24 weeks after the end of treatment (EOT).
Data collection and management
Patients were seen at each hospital every 3 to 6 months after SOF/VEL treatment according to Japanese guidelines for liver cirrhosis [14, 15]. Clinical data such as laboratory tests, liver imaging examinations and physical examinations were collected at the start of treatment, EOT, 12 weeks after the EOT, 24 weeks after the EOT and every 6 months thereafter. Liver imaging examinations such as ultrasonography, computed tomography or magnetic resonance imaging were performed at each hospital before treatment to confirm the absence of hepatocellular carcinoma (HCC). We collected the clinical information of participating patients from electronic medical records, and these data were registered and managed in the Research Electronic Data Capture system [16, 17].
Liver function
We evaluated CP class and the model for end-stage liver disease (MELD) score as indices of liver function. For the evaluation of CP class, the international normalization ratio (INR) score for patients taking warfarin was set at 1. The ascites score for patients taking diuretics with no ascites by liver imaging examination was set at 2. The hepatic encephalopathy (HE) score for patients taking branched-chain amino acid (BCAA) supplements or anti-hepatic encephalopathy drugs with no symptoms of HE was determined by the attending physician. The MELD score was calculated as 3.78 × ln total bilirubin [mg/dl] + 9.57 × ln creatinine [mg/dl] + 11.20 × ln INR + 6.43 according to previous reports [18,19,20,21].
Statistical analysis
Categorical variables are presented as frequencies, and continuous variables are presented as medians and interquartile ranges. For the survival analysis, the observation period started from the date when DAA treatment was initiated, and the last observation period was defined as the date of death or liver transplantation (LT) or last hospital visit, whichever came first. LT-free survival rates were estimated by Kaplan–Meier curves, and log-rank tests were used to analyze the differences in LT-free survival rates. We examined factors associated with LT-free survival by a Cox proportional hazards model excluding nine patients who died or were lost to follow-up by 12 weeks after the EOT. Factors identified as significant in the univariate model were analyzed in the multivariate model. In these analyses, we used two models that included either CP class (Model 1) or MELD score (Model 2). Factors associated with patients with CP-C at 12 weeks after the EOT were analyzed by a logistic regression model. All statistical analyses were performed using SPSS version 24.0 (IBM, Armonk, NY, USA). A two-tailed p-value less than 0.05 was defined as statistically significant. In the analyses of LT-free survival according to CP class, we used the Bonferroni method for multiple comparisons.
Results
Patient characteristics
The median age was 68 years, and 52% of patients were male (Table 1). The distributions of patients with CP-A, CP-B and CP-C were 10% (20/206), 76% (156/206) and 15% (30/206), respectively, and the median MELD score was 11. Six patients had virological relapse, one had no-response, and two were missing HCV RNA data. Five patients died, and four were lost to follow-up before the SVR could be determined. The SVR rate was 91.3% (188/206) in intention-to-treat fashion.
LT-free survival after SOF/VEL treatment
Among 206 patients, 26 patients died and two patients underwent LT during the median observation period of 28.1 months from the start of SOF/VEL treatment. The causes of death were liver failure in 13 patients, HCC in four patients, varix rupture, sepsis, heart failure, pancreatic cancer, cerebral infarction, gastric neuroendocrine carcinoma, and cancer of unknown primary in one patient each, and unknown causes in two patients. Two patients underwent LT due to liver failure without HCC. One was a 59-year-old female whose baseline CP score was 9. She achieved SVR, but her CP score deteriorated to 10 at 24 weeks after the EOT, and she underwent LT on day 298 after the start of treatment. The other was a 56-year-old male whose baseline CP score was 9. He achieved SVR, but his CP score deteriorated to 11 at 2 years after the EOT, and he underwent LT on day 833 after the start of treatment. The LT-free survival rates at 2 and 3 years were 90.0% and 83.2%, respectively (Fig. 1A). We compared survival rates according to baseline CP class by the Bonferroni method for multiple comparisons, and unadjusted p-values were shown. The 2 and 3-year LT-free survival rates were 95.0% and 95.0% for patients with CP-A, 91.2% and 83.2% for those with CP-B and 78.7% and 72.7% for those with CP-C, respectively, and there were no significant differences in LT-free survival rates (CP-A vs. CP-B; p = 0.678, CP-A vs. CP-C; p = 0.281, CP-B vs. CP-C; p = 0.191) (Fig. 1B).
Factors associated with LT-free survival among decompensated cirrhotic patients
We examined factors associated with LT-free survival by Cox proportional hazards model excluding nine patients who died or were lost to follow-up by 12 weeks after the EOT (Table 2). The characteristic of patients who died or were lost to follow-up by 12 weeks after the EOT are shown (Supplementary Table 1). In the LT-free survival analysis, 21 patients died and two patients underwent LT. In univariate analysis, the presence of ascites, HE, alanine aminotransferase (ALT) levels, creatinine levels, CP class at 12 weeks after the EOT and MELD score at 12 weeks after the EOT were significant factors. Multivariate analyses were conducted using two models that included either CP class (Model 1) or MELD score (Model 2). We excluded the factors of ascites and HE in the multivariate analysis using Model 1 and creatinine levels in the multivariate analysis using Model 2 since these factors were included in the formula for the CP score or MELD score. In Model 1, ALT levels (hazard ratio (HR): 0.976, 95% confidence interval (CI): 0.952–1.000, p = 0.046), creatinine levels (HR: 6.853, 95% CI: 1.964–23.912, p = 0.003) and CP-C at 12 weeks after the EOT (HR: 7.931, 95% CI: 2.441–25.773, p = 0.001) were significant factors for LT-free survival in multivariate analysis. In Model 2, the presence of HE (HR: 3.051, 95% CI: 1.098–8.474, p = 0.032) and MELD score at 12 weeks after the EOT (HR: 1.166, 95% CI: 1.042–1.306, p = 0.007) were significant factors for LT-free survival in multivariate analysis.
LT-free survival rates according to baseline and posttreatment liver function
We examined LT-free survival rates according to CP class or MELD score excluding nine patients who died or were lost to follow-up by 12 weeks after the EOT (Fig. 2). We compared survival rates according to CP class by the Bonferroni method for multiple comparisons, and unadjusted p-values were shown. For baseline CP class, 2- and 3-year LT-free survival rates were 100% and 100% for patients with CP-A, 92.4% and 84.3% for those with CP-B and 84.8% and 78.3% for those with CP-C, respectively, and there were no significant differences in LT-free survival rates (CP-A vs. CP-B; p = 0.360, CP-A vs. CP-C; p = 0.246, CP-B vs. CP-C; p = 0.557) (Fig. 2A). Regarding CP class at 12 weeks after the EOT, the 2- and 3-year LT-free survival rates were 100% and 91.0% for patients with CP-A, 91.6% and 86.4% for those with CP-B and 60.4% and 51.8% for those with CP-C, respectively, and the survival rates of patients with CP-C were significantly lower than those of patients with CP-A or CP-B (CP-A vs. CP-B; p = 0.269, CP-A vs. CP-C; p < 0.001, CP-B vs. CP-C; p < 0.001) (Fig. 2B). Receiver operating characteristic analysis was used to determine the optimal cut-off value of the MELD score at 12 weeks after the EOT for predicting LT-free survival. The optimal cut-off value of the MELD score at 12 weeks after the EOT was 15 by the Youden index. For baseline MELD score, the 2-year LT-free survival rates were 93.3% and 92.3% for patients with MELD scores less than 15 and MELD scores of 15 or more, respectively, and there were no significant differences in LT-free survival rates (p = 0.493) (Fig. 2C). Regarding the MELD score at 12 weeks after the EOT, the 2-year LT-free survival rates were 95.2% and 69.6% for patients with MELD scores less than 15 and MELD scores of 15 or more, respectively, and the survival rates of patients with MELD scores of 15 or more were significantly lower than those of patients with MELD scores less than 15 (p < 0.001) (Fig. 2D).
Changes in liver function between baseline and 12 weeks after the EOT
We examined the changes in CP class or MELD score between baseline and 12 weeks after the EOT (Fig. 3). For CP class, we evaluated CP class both at baseline and 12 weeks after the EOT for 193 patients. Among 150 patients with baseline CP-B, 60 improved to CP-A, 83 remained in CP-B, and seven deteriorated to CP-C at 12 weeks after the EOT. Among 26 patients with baseline CP-C, one and 14 improved to CP-A and CP-B, respectively, and 11 remained in CP-C at 12 weeks after the EOT (Fig. 3A).
For the MELD score, we evaluated the MELD score both at baseline and 12 weeks after the EOT for 177 patients. Among 16 patients with a baseline MELD score of 15 or more, 6 improved to a MELD score less than 15, and 10 maintained a MELD score of 15 or more at 12 weeks after the EOT (Fig. 3B).
Baseline factors associated with Child–Pugh class C at 12 weeks after the EOT among patients with Child–Pugh class B or C at baseline
Since no patients with CP-A at baseline deteriorated to CP-C at 12 weeks after the EOT, we examined baseline factors associated with CP class C at 12 weeks after the EOT among patients with CP-B or CP-C at baseline by a logistic regression model (Table 3). In the univariate analysis, the presence of HE, total bilirubin levels, the INR and albumin levels were significant factors. In the multivariate analysis, the presence of HE (HR: 4.200, 95% CI: 1.252–14.086, p = 0.020) and total bilirubin levels (HR: 1.786, 95% CI: 1.238–2.579, p = 0.002) were significant factors (Table 3).
Discussion
This study examined whether liver function stratified the prognosis of patients with HCV-associated decompensated cirrhosis who underwent DAA treatment using a prospectively registered cohort. This study revealed that posttreatment liver function, but not baseline liver function, could stratify patients’ survival after DAA treatment.
Liver function has been reported to be useful in stratifying the natural history of patients with cirrhosis [1, 2]. In the present study, CP class and MELD score at 12 weeks after the EOT were significantly associated with LT-free survival after DAA treatment (Table 2). The survival rates of patients with posttreatment CP-C were significantly lower than those of patients with posttreatment CP-A or CP-B, and the survival rates of patients with posttreatment MELD scores of 15 or more were significantly lower than those of patients with posttreatment MELD scores less than 15 (Fig. 2B, D). On the other hand, baseline CP class and MELD score were not significant (Fig. 2A, C). Few studies have reported an association between posttreatment liver function and prognosis among decompensated cirrhotic patients treated with DAA. Pereira et al. reported that the posttreatment MELD score was significantly associated with LT-free survival among decompensated cirrhotic patients who achieved an SVR after DAA treatment [22]. Improvement in liver function after DAA treatment is expected even among decompensated cirrhotic patients, and the posttreatment liver function rather than baseline liver function may be useful for stratifying patient survival. In the present study, creatinine level was extracted as a significant factor independent of CP class in Model 1, while HE was extracted as a significant factor independent of MELD score in Model 2. Considering that creatinine level is included in MELD score and that HE is included in CP class, both CP class and MELD score would be useful prognostic scores for patients with decompensated cirrhosis.
In the present study, the 3-year LT-free survival rate among patients with CP-C at 12 weeks after the EOT was significantly lower than that among patients with CP-A or CP-B (Fig. 2B). Recently, the BE3A score, which consists of body mass index (BMI), HE, ascites, ALT levels and albumin levels, was reported to be useful for predicting patients whose CP class improved to CP-A among patients with decompensated cirrhosis treated with DAA [23]. However, not becoming to CP-C might be more important considering patient prognosis. In the present study, the presence of HE and total bilirubin levels were significant factors associated with patients with CP-C at 12 weeks after the EOT (Table 3). HE is an abnormal neurological or psychiatric manifestation of acute or chronic liver disease, and one of the causes of HE is the presence of a portosystemic shunt [24]. Takaoka et al. reported that baseline total bilirubin levels and the diameter of portosystemic shunts were associated with non-improvement of CP score among decompensated cirrhotic patients who received DAA treatment [7]. Decompensated cirrhotic patients with HE may have an unfavorable prognosis due to poor improvement in CP class after DAA treatment. Future studies are needed to determine which patients will be in CP-C after DAA treatment.
In the present study, LT-free survival rates at 2 and 3 years were 90.0% and 83.2%, respectively, among decompensated cirrhotic patients treated with DAA during an observation period of 28.1 months (Fig. 1). In a European study, Krassenburg et al. [25] reported the prognosis of 149 patients with decompensated cirrhosis treated with DAA. In this report, the median age of the patients was 59 years, and the proportions of patients with CP-B and CP-C were 85% and 15%, respectively. During 27 months, 19 patients underwent LT, and the LT-free survival rate at 2 years was 81.2%. In another European study, Pageaux et al. [26] reported the prognosis of 483 patients with decompensated cirrhosis treated with DAA. In this report, the median age of the patients was 56.6 years, and the proportions of patients with CP-A, CP-B and CP-C were 57%, 37% and 6%, respectively. During 43.5 months, 26 patients underwent LT, and all-cause mortality was 5.2 per 100 patient-years. In the present study, the median age of the patients was 68 years, only two patients underwent LT, and the LT-free survival rate at 2 years was 90.0%. In comparison with the European reports, the patients of the present study were older and fewer underwent LT, and they seemed to have a better prognosis based on their survival rates. Our recent study of a small number of HCV-associated decompensated cirrhotic patients that compared clinical outcomes between patients who received DAA treatment and those who did not reported that liver function was improved in patients who underwent DAA treatment compared to those who did not, and mortality and incidence rates of decompensated events were lower among patients who received DAA treatment than among those who did not during an observation period of 2 years [27]. DAA treatment provides clinical benefit even for elderly decompensated cirrhotic patients or in areas where LT is not feasible.
The Japanese phase 3 study included patients with CP scores up to 12, and the prognosis after DAA treatment in patients with extremely deteriorated liver function is not clear [28]. Our study included three patients with a CP score of 12 and one patient with a CP score of 13. Among three patients with a CP score of 12, one discontinued DAA treatment due to liver failure and died on day 127 after the start of treatment. Another patient achieved SVR, but his CP score at SVR12 was 11, and he died due to HCC on day 368 after the start of treatment. The other patient achieved SVR, improved his CP score at SVR12 to 9, and did not have any decompensated event or death until the last follow-up time at 1 year after the EOT. The patient with a CP score of 13 achieved SVR, but her CP score at SVR12 remained 13, and did not have any decompensated event or death until the last follow-up time on day 547 after the start of treatment. Whether DAA treatment improves the prognosis of patients with extremely deteriorated liver function needs further study.
In the present study, the change in CP score from before to after treatment was larger than the changes in MELD score. We previously reported that improvement in albumin levels were observed in about 50% of decompensated cirrhotic patients after DAA treatment, but improvements in total bilirubin levels and prothrombin were observed in only about 10% of decompensated cirrhotic patients [6]. The differences in the before-after changes between CP class and MELD score are likely due to CP class’s inclusion of albumin level, which MELD score does not include.
The present study had some limitations. First, the number of patients who died during follow up was relatively small in this study. Second, information on diuretics, BCAA supplements, and anti-hepatic encephalopathy drugs were not collected. Third, only Japanese patients were included.
In conclusion, the prognosis of decompensated cirrhotic patients who underwent DAA treatment was clearly stratified by liver function at 12 weeks after the EOT but not baseline liver function. The absence of CP-C after DAA treatment is important in predicting a favorable prognosis for HCV patients with decompensated cirrhosis.
Abbreviations
- CP:
-
Child–Pugh
- HCV:
-
Hepatitis C virus
- DAA:
-
Direct-acting antiviral
- IRB:
-
Institutional review board
- SOF:
-
Sofosbuvir
- VEL:
-
Velpatasvir
- SVR:
-
Sustained virologic response
- EOT:
-
End of treatment
- MELD:
-
Model for end-stage liver disease
- INR:
-
International normalization ratio
- HE:
-
Hepatic encephalopathy
- BCAA:
-
Branched-chain amino acid
- LT:
-
Liver transplantation
- HCC:
-
Hepatocellular carcinoma
- ALT:
-
Alanine aminotransferase
- HR:
-
Hazard ratio
- CI:
-
Confidence interval
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Acknowledgements
The authors thank Yoshihito Uchida (Department of Gastroenterology and Hepatology, Saitama Medical University), Shinnya Maekawa (First Department of Internal Medicine, Faculty of Medicine, University of Yamanashi), Kotaro Kumagai (Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medicine and Dental Sciences), Nobuharu Tamaki (Department of Gastroenterology and Hepatology, Musashino Red Cross Hospital), Yohei Koizumi (Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine), Kohei Kotani (Department of Hepatology, Graduate School of Medicine, Osaka Metropolitan University), Tetsuro Shimakami (Department of Gastroenterology, Kanazawa University Graduate School of Medicine), Yasuhide Motoyoshi (Clinical Research Center, National Hospital Organization Nagasaki Medical Center), Norihisa Nishimura (Department of Gastroenterology, Nara Medical University), Masato Nakamura (Department of Gastroenterology, Graduate School of Medicine, Chiba University), Takuro Hisanaga (Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine), Masanori Fukushima (Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences), Miyako Murakawa (Department of Gastroenterology and Hepatology, Department of Liver Disease Control, Tokyo Medical and Dental University), Yuya Seko (Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine), Kyoko Hoshikawa (Department of Gastroenterology, Faculty of Medicine, Yamagata University), Tatsuya Minami (Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo), Tatsushi Naito (Second Department of Internal Medicine, Faculty of Medical Sciences, University of Fukui), Atsunori Tsuchiya (Division of Gastroenterology and Hepatology, Graduate School of Medicine and Dental Sciences, Niigata University) and Takao Miwa (Department of Gastroenterology/Internal Medicine Gifu University Graduate School of Medicine) for their assistance in data collection and Rina Okada (Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine) and Yuki Nishimura (Department of Medical Innovation, Osaka University Hospital) for their assistance in data management.
Funding
Open access funding provided by Osaka University. This study was partially supported by a Grant-in-Aid for Research on Hepatitis from the Japan Agency for Medical Research and Development (JP23fk0210113) and Gilead Sciences, Inc.
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The study conception, design, interpretation of the data and drafting of the manuscript: YT, HH and TT. Data analysis: YT and TY. All authors contributed to data collection, and read and approved the final manuscript.
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Satoshi Mochida received lecture fees from Gilead Sciences, Inc., AbbVie GK., ASKA Pharmaceutical Co., Ltd., Toray Industries Inc., Otuska Pharmaceutical Co., Ltd. and Eisai Co., Ltd. Masayuki Kurosaki received lecture fees from Gilead, AbbVie, Eisai, Chugai, AstraZeneca, Lilly and Takeda. Norifumi Kawada received research grants from AstraZeneca plc., Bristol Myers Squibb., Glaxosmithkline plc., MSD co., ltd., Gilead Sciences. Inc. and NovoNordisk pharma Ltd., scholarship grants from AbbVie GK, Eisai Co., Ltd. and Otsuka Pharmaceutical Co. and received lecture fees from AbbVie GK, Gilead Sciences, Inc. and MSD Co., Ltd. Goki Suda received research grants from Gilead Sciences Inc. Hitoshi Yoshiji received lecture fees from Gilead Sci. Naoya Kato received research grants from AbbVie G.K., scholarship grants from Gilead Sciences Inc., and lecture fees from Gilead Sciences, Inc. and AbbVie G.K. Taro Takami received lecture fees from Gilead Sciences, Inc. Yasuhiro Asahina belongs to a donation-funded department funded by Fujirebio Inc. and Abbott Japan LLC. Yoshito Itoh received research grants from Merck Sharp and Dohme., scholarship grants from AbbVie Inc. and Takeda Pharm. Co.Ltd. and lecture fees from AbbVie Inc and Gilead Sciences Inc. Shuji Terai received lecture fees from Otsuka, AbbVie, Asuka, Daiichisankyo, Chiomu Takedansen and Gilead. Yoshiyuki Ueno received lecture fees from AbbVie Inc. Norio Akuta received lecture fees from AbbVie Inc. Tetsuo Takehara received research grants and lecture fees from AbbVie GK. and Gilead Sciences, Inc. All other authors declare that they have no conflicts of interest to disclose.
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Tahata, Y., Hikita, H., Mochida, S. et al. Posttreatment liver function, but not baseline liver function stratifies patient survival after direct-acting antiviral treatment in decompensated cirrhosis with hepatitis C virus. J Gastroenterol 58, 1211–1221 (2023). https://doi.org/10.1007/s00535-023-02039-x
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DOI: https://doi.org/10.1007/s00535-023-02039-x