Low-dose capecitabine adjuvant chemotherapy in elderly stage II/III colorectal cancer patients (LC-ACEC): study protocol for a randomized controlled trial. - Yazhou He; Ping Liu; Yuanchuan Zhang; Xiangbing Deng; Wenjian Meng; Mingtian Wei; Tinghan Yang; Ziqiang Wang; Meng Qiu (Trials, 2015)