Received: 31 January 2019
Accepted: 2 June 2019
First Online: 8 June 2019
Compliance with ethical standards
: Chikako Shimizu has been paid for consulting or advisory role by Eisai Co., Ltd. during the study; and outside the submitted study, been paid honoraria by AstraZeneca K.K., Kyowa Hakko Kirin Co., Ltd., Chugai Pharmaceutical Co., Ltd., ASKA Pharmaceutical Co., Ltd., and Taiho Pharmaceutical Co. Ltd.; been paid for consulting or advisory role by Eli Lilly Japan K.K., Pfizer Japan Inc., and AstraZeneca K.K.; and conducted research projects funded by Eli Lilly Japan K.K., MSD K.K., Chugai Pharmaceutical Co., Ltd., and Pfizer Japan Inc. Yukinori Sakata, Ruiko Sakai, Hiroki Ikezawa, and Toshiyuki Matsuoka are employees of Eisai Co., Ltd. Yoshiki Uetaki is an employee of Anterio Inc.