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Article History

Received: 15 December 2020

Accepted: 14 January 2021

First Online: 22 January 2021

Compliance with ethical standards

:

: Norikazu Matsuo reports receiving personal fees from Ono Pharmaceutical outside the submitted work; Koichi Azuma reports receiving personal fees from Ono Pharmaceutical, Chugai Pharmaceutical, AstraZeneca, MSD Oncology, and Bristol Myers Squibb, outside the submitted work; Hidenobu Ishii reports receiving grants and personal fees from Boehringer-Ingelheim, and personal fees from Ono Pharmaceutical, Chugai Pharmaceutical, AstraZeneca, and MSD Oncology, outside the submitted work; Takaaki Tokito reports receiving personal fees from Chugai Pharmaceutical, AstraZeneka, MSD and Boehringer Ingelheim, outside the submitted work; Kazuhiko Yamada reports receiving personal fees from Chugai Pharmaceutical, and Novartis Pharma K.K., outside the submitted work. The remaining authors have no conflicts of interest to disclose.

: All procedures involving human participants were performed in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

: Informed consent was obtained from all individual participants included in the study.