Improved efficacy and safety of low-dose oxaliplatin/pegylated liposomal doxorubicin/S-1 regimen in advanced gastric cancer: a cohort study - Ma, Jian; Xiao, Min; Li, Xiaoqian; Zhao, Qiu; Ye, Wei; Ji, Wenjing; Ling, Yang; Yang, Quanliang (Annals of Palliative Medicine, 2021)