- Correspondence to Dr Carmen Stolwijk, Department of Medicine, Division of Rheumatology, Maastricht University Medical Center; School for Public Health and Primary Care (CAPHRI), University of Maastricht, PO Box 5800, Maastricht 6202 AZ, The Netherlands;
- Received March 7, 2013
- Revised June 25, 2013
- Accepted August 18, 2013
- First published September 2, 2013.
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