- Correspondence to Dr Sofia Ramiro, Department of Rheumatology, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, Leiden 2300 RC, The Netherlands;
- Received 21 October 2016
- Revised 28 December 2016
- Accepted 19 February 2017
- Published online 13 May 2017.
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