- Correspondence to Dr John Varga, Division of Rheumatology, Northwestern University Feinberg School of Medicine, McGaw Pavilion M230D, 240 E Huron St, Chicago, IL 60611, USA;
- Accepted February 24, 2013
- First published March 20, 2013.
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.