- Correspondence to Y van Eijk-Hustings, Department of Integrated Care/Department of Rheumatology, Maastricht University Medical Centre, PO Box 5800, Maastricht 6202 AZ, The Netherlands;
- Received 10 October 2012
- Revised 23 December 2012
- Accepted 3 February 2013
- Published online 10 May 2013.
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