Usefulness of alternate-day administration of S-1 and leucovorin in a xenograft mouse model of colorectal cancer: a shorter drug-free interval leads to more efficient antitumor effects

Toshihiro Komura, Koh Miura, Tetsuhiko Shirasaka, Shinobu Ohnuma, Miki Shimada, Taiki Kajiwara, Fumiyoshi Fujishima, Alex Philchenkov, Kei Nakagawa, Katsuyoshi Kudoh, Sho Haneda, Masahide Toshima, Atsushi Kohyama, Hiroaki Musha, Takeshi Naitoh, Chikashi Shibata, Michiaki Unno