- Correspondence to A Willemien Visser, Department of Rheumatology, Leiden University Medical Center, C1-R, P.O. Box 9600, Leiden 2300 RC, The Netherlands;
- Received December 3, 2013
- Revised March 21, 2014
- Accepted May 1, 2014
- First published May 20, 2014.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.