- Correspondence to Professor Josef S Smolen, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Waehringer Guertel 18–20, A-1090 Vienna, Austria; or
- Accepted 3 February 2010
- Published in print 1 June 2010.
- Published online 24 May 2010.
- Published first 5 May 2010.
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