- Correspondence to: Professor Tatsuya Atsumi, Division of Rheumatology, Endocrinology and Nephrology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan;
- Received July 20, 2016
- Revised December 7, 2016
- Accepted January 1, 2017
- First published February 2, 2017.
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