Kubota Y, Fujita K, Takahashi T, Sunakawa Y, Ishida H, Hamada K, Ichikawa W, Tsunoda T, Shimada K, Masuo Y, Kato Y, and Sasaki Y. Higher systemic exposure to unbound active metabolites of regorafenib is associated with short progression-free survival in colorectal cancer patients. Clin Pharmacol Ther 108(3): 586-595, 2020. ※昭和大学グループが中心の共同研究