Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (No. 21119002)
JSPS KAKENHI (JP16H06395)
JSP KAKENHI (16H06398)
Received: 25 March 2020
Accepted: 31 August 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: The study protocol was approved by the Research Ethics Committee of the Graduate School of Medicine and the Faculty of Medicine, The University of Tokyo, Japan [No.630–73361]. All participants had given informed written consent to participate in the study.
: Not applicable.
: The authors declare no competing interest.