Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (15H05006, 19K09393)
Received: 13 July 2020
Accepted: 15 July 2020
First Online: 22 July 2020
Ethics approval and consent to participate
: The Ethics Committee of Kyoto University and each participating institution approved this study protocol (R1045), and written informed consent was waived.
: Not applicable
: The authors declare that they have no competing interests.