- Correspondence to Professor Georg Schett, Department of Internal Medicine 3, Rheumatology and Immunology, University of Erlangen-Nuremberg, Ulmenweg 18, Erlangen 91054, Germany;
- Received January 15, 2016
- Revised May 12, 2016
- Accepted May 16, 2016
- First published June 3, 2016.
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