Shima, Azusa
Tatsumi, Yukako
Ishizaki, Tatsuro
Godai, Kayo
Kawatsu, Yuichiro
Okamura, Tomonori
Nishikawa, Tomofumi
Morimoto, Akiko
Morino, Ayumi
Miyamatsu, Naomi
Article History
Received: 9 July 2015
Revised: 28 November 2015
Accepted: 30 November 2015
First Online: 14 January 2016
Competing interests
: Two of the authors (AS and YK) are salaried employees of the retail company whose employees are insured by the Employees’ Health Insurance Society; they provided the data for the present study. The other authors declare no conflict of interest.
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