Tamaki, J. http://orcid.org/0000-0003-3930-9729
,
Fujimori, K.
Ikehara, S.
Kamiya, K.
Nakatoh, S.
Okimoto, N.
Ogawa, S.
Ishii, S.
Iki, M.
Article History
Received: 13 August 2018
Accepted: 4 January 2019
First Online: 16 January 2019
Compliance with ethical standards
: The Ethics Committee of the Kindai University Faculty of Medicine approved the study protocol. We included only crosstab data provided by the Ministry of Health, Labor and Welfare Insurance Bureau. These data were completely anonymous; thus, informed consent was not required.
: None.