Funding for this research was provided by:
Japan Society for the Promotion of Science (18H03040, 18K16518, 18K16184, 17K17053)
Text and Data Mining valid from 2019-11-06
Received: 22 July 2019
Accepted: 30 September 2019
First Online: 6 November 2019
Ethics approval and consent to participate
: The institutional review boards in Hiroshima University (Trial registration: E-447, Registered 5 Aug 2016) and Kyoto prefectural University of Medicine (Trial registration: ERB-C-973, Registered 19 October 2017) approved an opt-out method of informed consent.
: Not applicable.
: The authors declare that they have no competing interests.