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Letter to the editor: 5-year follow-up results of a JCOG1104 (OPAS-1) phase III non-inferiority trial to compare 4 courses and 8 courses of S-1 adjuvant chemotherapy for pathological stage II gastric cancer

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The Original Article was published on 21 November 2023

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References

  1. Yoshikawa T, Terashima M, Mizusawa J, et al. 5-year follow-up results of a JCOG1104 (OPAS-1) phase III non-inferiority trial to compare 4 courses and 8 courses of S-1 adjuvant chemotherapy for pathological stage II gastric cancer. Gastric Cancer. 2024;27:155–63. https://doi.org/10.1007/s10120-023-01447-5.

    Article  CAS  PubMed  Google Scholar 

  2. Yoshikawa T, Terashima M, Mizusawa J, et al. Four courses versus eight courses of adjuvant S-1 for patients with stage II gastric cancer (JCOG1104 [OPAS-1]): an open-label, phase 3, non-inferiority, randomised trial. Lancet Gastroenterol Hepatol. 2019;4:208–16. https://doi.org/10.1016/s2468-1253(18)30383-2.

    Article  PubMed  Google Scholar 

  3. Dafni U. Landmark analysis at the 25-year landmark point. Circ Cardiovasc Qual Outcomes. 2011;4:363–71. https://doi.org/10.1161/circoutcomes.110.957951.

    Article  PubMed  Google Scholar 

  4. Kim HS, Kang J, Hwang D, et al. Prasugrel-based de-escalation of dual antiplatelet therapy after percutaneous coronary intervention in patients with acute coronary syndrome (HOST-REDUCE-POLYTECH-ACS): an open-label, multicentre, non-inferiority randomised trial. Lancet. 2020;396:1079–89. https://doi.org/10.1016/s0140-6736(20)31791-8.

    Article  CAS  PubMed  Google Scholar 

  5. Sakuramoto S, Sasako M, Yamaguchi T, et al. Adjuvant chemotherapy for gastric cancer with S-1, an oral fluoropyrimidine. N Engl J Med. 2007;357:1810–20. https://doi.org/10.1056/NEJMoa072252.

    Article  CAS  PubMed  Google Scholar 

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Correspondence to Yoon-Koo Kang.

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Kim, HD., Ryu, MH., Lee, J.S. et al. Letter to the editor: 5-year follow-up results of a JCOG1104 (OPAS-1) phase III non-inferiority trial to compare 4 courses and 8 courses of S-1 adjuvant chemotherapy for pathological stage II gastric cancer. Gastric Cancer (2024). https://doi.org/10.1007/s10120-024-01496-4

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  • DOI: https://doi.org/10.1007/s10120-024-01496-4

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