%0 Letter %T 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. %A Kim HD %A Ryu MH %A Lee JS %A Kang YK %J Gastric Cancer %V 27 %N 4 %D 2024 Jul 11 %M 38602609 %F 7.701 %R 10.1007/s10120-024-01496-4