Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (JP21119003, 1119002)
Japan Society for the Promotion of Science (JP16H06398, 16H06396)
Received: 19 February 2020
Accepted: 6 August 2020
First Online: 17 August 2020
Ethics approval and consent to participate
: The Committees of Ethics in Research of Human Subjects of the Graduate School of Medicine of The University of Tokyo approved the study protocol and informed consent procedure (No. 3073-(1)). Informed consent was obtained in writing.
: Not applicable.
: The authors declare that they have no competing interests.