Received: 25 June 2020
Accepted: 30 January 2021
First Online: 10 February 2021
Ethics approval and consent to participate
: The protocol was approved by the ethics committee of Shionogi & Co., Ltd. Informed consent was not required, as the anonymized data were shared with the Institute of Statistical Mathematics only, as required by the Act on the Protection of Personal Information.
: Not applicable.
: TB, TH and YK are employees of Shionogi & Co., Ltd. NH has received research funding and has served as a consultant, advisory board member, and/or speaker for Shionogi & Co., Ltd.