2107 Safety and efficacy on TAS-102 monotherapy in patients with metastatic colorectal cancer according to previous regorafenib. (September 2015) - Kotani, D.; Shitara, K.; Fukuoka, S.; Kuboki, Y.; Bando, H.; Okamoto, W.; Kojima, T.; Doi, T.; Ohtsu, A.; Yoshino, T.