- Correspondence to Dr Bing Lu, Division of Rheumatology, Immunology & Allergy, Brigham & Women's Hospital and Harvard Medical School, 75 Francis Street PBB-B3, Boston, MA 02115, USA;
- Received February 22, 2014
- Revised June 12, 2014
- Accepted July 11, 2014
- First published July 23, 2014.
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