Received: 29 November 2020
Accepted: 28 March 2021
First Online: 7 April 2021
: The study was approved by the Institutional Review Board of Juntendo University Graduate School of Medicine (no. 19-138) and performed following the ethical guidelines for clinical studies. Informed consent was obtained in the form of opt-out on the web-site of our institution.
: Not applicable.
: Drs. Fumihiro Kawano, Ryuji Yoshioka, Yu Gyoda, Hirofumi Ichida, Tomoya Mizuno, Shigeto Ishii, Toshio Fujisawa, Hiroshi Imamura, Yoshihiro Mise, Hiroyuki Isayama, and Akio Saiura have nothing to disclose.