- Correspondence to Dr Haruhiko Inada, International Affairs Division, Ministry of Health, Labour and Welfare, 1-2-2 Kasumigaseki, Chiyoda-ku, Tokyo 100-8916, Japan;
- Received March 21, 2016
- Revised October 11, 2016
- Accepted November 30, 2016
- First published December 30, 2016.
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