- Correspondence to Joachim Sieper, Charité, Campus Benjamin Franklin, Medical Clinic I, Rheumatology, Hindenburgdamm 30, 12200 Berlin, Germany;
- Accepted February 1, 2011
- First published March 17, 2011.
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.