Amano, Koji
Morita, Tatsuya
Miyamoto, Jiro
Uno, Teruaki
Katayama, Hirofumi
Tatara, Ryohei
Article History
Received: 7 July 2017
Accepted: 11 February 2018
First Online: 5 March 2018
Compliance with ethical standards
: The completion and return of the questionnaire was regarded as consent to participate in this study. The Institutional Review Board approved this study.
: The authors declare that they have no conflict of interest.