- Correspondence to Professor Josef S Smolen, Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, Waehringer Guertel 18-20, Vienna A-1090, Austria;
- Received 7 September 2013
- Revised 5 October 2013
- Accepted 11 October 2013
- Published in print 23 October 2013.
- Published online 25 October 2013.
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