- Correspondence to Dr Toshi A Furukawa, Departments of Health Promotion and Human Behavior and of Clinical Epidemiology, Kyoto University Graduate School of Medicine and School of Public Health, Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan;
- Received 14 October 2017
- Revised 10 December 2017
- Accepted 15 December 2017
- Published online 12 January 2018.
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