Article History
Received: 9 October 2019
Accepted: 2 December 2019
First Online: 11 December 2019
Compliance with ethical standards
:
: YO has received honoraria from AstraZeneca Japan, Boehringer-Ingelheim Japan, Chugai Pharmaceutical Co. Ltd., Eli Lily Co. Ltd., MSD K. K., and Ono Pharmaceutical Co. The other authors have no conflicts of interest to disclose.
: This study protocol was approved by the Ethics Committee of the Tokyo Metropolitan Cancer and Infectious diseases Center Komagome Hospital (#2272) and was conducted in accordance with the tenets of the Declaration of Helsinki.
: Instead of obtaining informed consent from each patient, participants or their next of kin were given the opportunity to opt-out.