- Correspondence to Professor Georg Schett, Department of Internal Medicine 3, Rheumatology and Immunology, University Clinic of Erlangen-Nuremberg, Erlangen; Ulmenweg 18, Erlangen 91054, Germany;
- Received January 31, 2016
- Revised April 26, 2016
- Accepted May 27, 2016
- First published June 20, 2016.
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