- Correspondence to Dr Jason S Knight, Division of Rheumatology, Department of Internal Medicine, University of Michigan, 5520A MSRB1, 1150 W Medical Center Drive, SPC 5680, Ann Arbor, MI 48109-5680, USA;
- Received September 29, 2016
- Accepted October 2, 2016
- First published October 21, 2016.
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