Funding for this research was provided by:
Ministry of Health, Labour and Welfare (20HA2003)
Received: 13 May 2021
Accepted: 14 September 2021
First Online: 21 September 2021
: This study was approved by the Institutional Review Board of the National Center for Global Health and Medicine (Approval number: NCGM-G-002505-00).
: Not applicable.
: Yuichi Muraki received an honorarium for lecturing from Pfizer Japan, Inc. The other authors have no conflicts of interest to declare.