- Correspondence to Professor Koji Kawakami, Department of Pharmacoepidemiology, Graduate School of Medicine, Kyoto University, Yoshida Konoecho, Sakyoku, Kyoto 606-8501, Japan;
- Received November 5, 2016
- Revised January 30, 2017
- Accepted February 28, 2017
- First published March 18, 2017.
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