- Correspondence to Professor Georg Schett, Department of Internal Medicine 3, Rheumatology and Immunology, University Clinic of Erlangen-Nuremberg, Erlangen; Ulmenweg 18, 91054 Erlangen, Germany;
- Received October 12, 2017
- Revised October 29, 2017
- Accepted October 30, 2017
- First published November 16, 2017.
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