- Correspondence to Erik Hans Vogelzang, Department of Rheumatology, Jan van Breemen Research Institute | Reade, Dr Jan van Breemenstraat 2, Amsterdam 1056 AB, The Netherlands;
- Received March 11, 2014
- Revised June 10, 2014
- Accepted July 20, 2014
- First published August 12, 2014.
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