Funding for this research was provided by:
Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (26462689)
Text and Data Mining valid from 2019-12-01
Received: 19 February 2019
Accepted: 21 November 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: The Ethics Committee of Kagawa University Faculty of Medicine approved the study protocol.
: Not applicable.
: The authors declare that they have no competing interests.