- Correspondence to Professor Jonathan Kay, Division of Rheumatology, Department of Medicine, University of Massachusetts Medical School and UMass Memorial Medical Center, Rheumatology Center, Memorial Campus, 119 Belmont Street, Worcester, MA 01605, USA;
- Received June 28, 2013
- Revised September 23, 2013
- Accepted November 24, 2013
- First published December 16, 2013.
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