Funding for this research was provided by:
JSPS Grant-in-Aids for Early-Career Scientists (18K18395)
JSPS Grant-in-Aids for Scientific Research (17H03276)
Text and Data Mining valid from 2019-01-24
Received: 20 September 2018
Accepted: 27 December 2018
First Online: 24 January 2019
Compliance with ethical standards
: This study was approved by the institutional ethical committee and was performed with the informed consent of the subject.
: The author(s) declare that they have no competing interests.