- Correspondence to Professor Tsutomu Takeuchi, Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan;
- Received June 10, 2015
- Revised October 6, 2015
- Accepted October 27, 2015
- First published November 19, 2015.
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- Data supplement 1 - Online supplement
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