434 Follow-up after resection of metastatic liver tumor from colorectal cancer using circulating cell-free DNA. (September 2015) - Iwai, T.; Yamada, T.; Kan, H.; Matumoto, S.; Koizumi, M.; Shinji, S.; Matuda, A.; Yokoyama, Y.; Takahashi, G.; Watanabe, A.; Nakayama, M.; Shiro, K.; et al.