- Correspondence to Professor Paul P Tak, Department of Clinical Immunology and Rheumatology, Room F4-105, Academic Medical Center, University of Amsterdam, P.O. box 22700, Amsterdam 1100 DE, The Netherlands;
- Received May 10, 2013
- Revised September 9, 2013
- Accepted November 6, 2013
- First published December 2, 2013.
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