- Correspondence to Professor Tsutomu Takeuchi, Division of Rheumatology, Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan; 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan;
- Received July 21, 2015
- Revised October 18, 2015
- Accepted November 13, 2015
- First published December 15, 2015.
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- Data supplement 1 - Online supplement
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