Received: 1 July 2020
Accepted: 19 January 2021
First Online: 15 April 2021
: All participants provided written informed consent, and the study was approved by the ethics committees of Saitama Medical University International Medical Center (16–188).
: The participants consented to the publication of their images.
: Shigeru Makita received honorarium from Otsuka Pharmaceutical Co., Ltd. and Daiichi Sankyo Co., Ltd. and Fukuda Electronics Co., Ltd.