- Correspondence to Dr Sofia Ramiro, Department of Clinical Immunology & Rheumatology, Amsterdam Rheumatology Center, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands;
- Received January 3, 2014
- Revised April 1, 2014
- Accepted April 13, 2014
- First published May 7, 2014.
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