- Correspondence to Professor Paul Emery, Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, LMBRU LTHT, Chapel Allerton Hospital, Leeds LS7 4SA, UK;
- Received May 22, 2013
- Revised December 10, 2013
- Accepted December 22, 2013
- First published January 17, 2014.
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