- Correspondence to Professor Josef S Smolen, Division of Rheumatology, Department of Medicine III, Medical University of Vienna and 2nd Department of Medicine, Hietzing Hospital, Waehringer Guertel 18–20, Vienna A-1090, Austria;
- Received December 23, 2013
- Revised March 3, 2014
- Accepted March 6, 2014
- First published April 3, 2014.
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