- Correspondence to Dr Ahmed S Zayat, Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), Second Floor, Chapel Allerton Hospital, Leeds LS7 4SA, UK;
- Received November 8, 2013
- Revised December 23, 2013
- Accepted December 27, 2013
- First published January 20, 2014.
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