Ishikawa, Norihiko
Oda, Makoto
Kawachi, Kenji
Watanabe, Go
Article History
Received: 13 March 2016
Accepted: 14 June 2016
First Online: 8 November 2018
Compliance with ethical standards
:
: Norihiko Ishikawa and the other co-authors have no conflicts of interest associated with this study.