- Correspondence to Dr Bing Lu, Division of Rheumatology, Immunology and Allergy, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street, PBB-B3, Boston, MA 02115, USA. .
- Received August 29, 2016
- Revised December 4, 2016
- Accepted January 8, 2017
- First published January 30, 2017.
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