Funding for this research was provided by:
Research fund from Mutual Aid Medical Society (469)
Received: 12 May 2019
Accepted: 3 October 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: Opt-out consent was obtained instead of informed consent according to Institutional Review Board of Toranomon Hospital.
: Toshimi Takano has competing interest with Daiichi-Sankyo, Kyowa Hakko Kirin, and Eisai. Other members have no competing interests to declare.