- Correspondence to Dr Rennie L Rhee, Department of Rheumatology, Perelman School of Medicine at the University of Pennsylvania, 3400 Spruce Street, White Building 5th Floor, Philadelphia, PA 19104, USA;
- Received June 30, 2016
- Revised September 1, 2016
- Accepted November 5, 2016
- First published November 28, 2016.
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