- 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 November 11, 2013
- Revised May 6, 2014
- Accepted May 22, 2014
- First published June 9, 2014.
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