Funding for this research was provided by:
MEXT KAKENHI (JP21119003)
JSPS KAKENHI (JP16H06395, 16H06398, and 16K21720)
Grant-in-Aid for Scientific Research on Innovative Areas from the Ministry of Education, Culture, Sports, Science and Technology, Japan (1119002)
Received: 13 January 2019
Accepted: 23 June 2019
First Online: 9 July 2019
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.630–7,3361]. Participants were assessed after all of them had given informed written consent to participate in the study.
: Not applicable.
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.