- Correspondence to Professor Désirée van der Heijde, Department of Rheumatology, Leiden University Medical Center, PO Box 9600, Leiden 2300 RC, The Netherlands;
- Received 4 November 2016
- Revised 29 November 2016
- Accepted 5 December 2016
- Published in print 1 June 2017.
- Published online 13 May 2017.
- Published first 13 January 2017.
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