- Correspondence to Dr Sofia Ramiro, Department of Rheumatology, Leiden University Medical Center, PO Box 9600, 2300RC Leiden, The Netherlands;
- Received August 25, 2015
- Revised October 12, 2015
- Accepted October 30, 2015
- First published December 11, 2015.
This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.
- Data supplement 1 - Online supplement
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.