Nakamura, Yoshihiro http://orcid.org/0000-0002-7181-5739
Yokoya, Shin
Harada, Yohei
Ochi, Mitsuo
Adachi, Nobuo
Article History
Received: 1 January 2019
Accepted: 30 April 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: This article was approved by the Ethical Committee for Epidemiology of Hiroshima University Study Number Epi-734.
: Not applicable.
: The authors declare that they have no competing interests.
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