Funding for this research was provided by:
Japan Society for the Promotion of Science (17K16080)
Received: 23 May 2019
Accepted: 3 September 2019
First Online: 23 September 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee on Human Research of Graduate School of Medicine, Kyoto University, and was conducted in accordance with the Helsinki Declaration.
: Not applicable.
: The authors declare that they have no competing interests.