- Correspondence to Professor Paul Emery, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Chapel Allerton Hospital, Chapeltown Road, Leeds LS7 4SA, UK;
- Received August 18, 2014
- Revised March 10, 2015
- Accepted March 22, 2015
- First published April 8, 2015.
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