P-258HGCSG1503: A retrospective cohort study evaluating the safety and efficacy of TAS-102 in patients with metastatic colorectal cancer: Analysis of cases of prior regorafenib. (20th June 2018) - Shindo, Y; Yuki, S; Yagisawa, M; Kawamoto, Y; Tsuji, Y; Hatanaka, K; Kobayashi, Y; Kajiura, S; Ishiguro, A; Honda, T; Dazai, M; Eto, K; et al.