- Correspondence to Dr Kiyomi Shinohara, Departments of Health Promotion and Human Behavior and of Clinical Epidemiology, Kyoto University Graduate School of Medicine/School of Public Health, Kyoto 606-8501, Japan;
- Received November 25, 2018
- Revised December 12, 2018
- Accepted December 21, 2018
- First published January 21, 2019.
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