- Correspondence to Dr Hege Svean Koksvik, Department of Rheumatology, University Hospital of Trondheim, St. Olavs Hospital, PO Box 3250, Sluppen, Trondheim 7006, Norway;
- Received July 2, 2012
- Revised January 11, 2013
- Accepted January 13, 2013
- First published February 7, 2013.
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