- Correspondence to Dr Marius Henriksen, Department of Rheumatology, The Parker Institute, Copenhagen University Hospital, Frederiksberg, Ndr. Fasanvej 57, Copenhagen DK-2000, Denmark;
- Received July 11, 2012
- Revised October 12, 2012
- Accepted November 18, 2012
- First published December 8, 2012.
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