We thank the participants of the study.
Funding
This study was partially supported by the Grant from the Natural Science Foundation of Liaoning Province (no. 201800050) for Dr. Xingshun Qi. The article processing charges were funded by the authors.
Authorship
All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.
Authorship Contributions
Xingshun Qi conceived the study, analyzed the data, performed the statistical analyses, and wrote the paper; Yiling Li, Ran Wang, Lianjie Lin, Jing Li, Lijun Wang, Shuang Zheng, Yonghong Sun, Lixin Zhao, Xiaolin Fu, Mengchun Wang, Xinping Qiu, Han Deng, Cen Hong, Qianqian Li, and Hongyu Li collected the data and analyzed the data; Xiaozhong Guo conceived and supervised the study. All authors read and approved the final manuscript. The authors Xingshun Qi, Yiling Li and Ran Wang are co-first authors and contributed to this work equally.
Disclosures
All authors, including Xingshun Qi, Yiling Li, Ran Wang, Lianjie Lin, Jing Li, Lijun Wang, Shuang Zheng, Yonghong Sun, Lixin Zhao, Xiaolin Fu, Mengchun Wang, Xinping Qiu, Han Deng, Cen Hong, Qianqian Li, Hongyu Li, and Xiaozhong Guo, declared no conflict of interest related to this work. The funding sponsor did not influence the results of this study.
Compliance with Ethics Guidelines
This cross-sectional study was carried out following the rules of the Declaration of Helsinki and approved by the Medical Ethical Committee of the General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area), which is the principal affiliation of this study. The approval number was k(2015)11. This study was registered (ClinicalTrials.gov ID: NCT02593799). Considering the nature of this observational study, the patients’ written informed consent was waived.
Data Availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.