- Correspondence to Dr M E Weinblatt, Harvard Medical School, Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA;
- Received April 8, 2013
- Revised July 19, 2013
- Accepted July 27, 2013
- First published September 3, 2013.
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