- Correspondence to Professor Robert Landewé, Department of Clinical Immunology and Rheumatology, Amsterdam Rheumatology and immunology Center, Academic Medical Center/University of Amsterdam, Meibergdreef 9, Amsterdam 1105AZ, The Netherlands;
- Received December 30, 2014
- Revised July 7, 2015
- Accepted July 14, 2015
- First published August 5, 2015.
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- Data supplement 1 - Online table
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