- Correspondence to Professor Xenofon Baraliakos, Rheumazentrum Ruhrgebiet, Ruhr-University Bochum, Claudiusstr. 45, 44649 Herne, Nordrhein-Westfalen, Germany;
- Received August 6, 2020
- Revised November 30, 2020
- Accepted December 1, 2020
- First published December 17, 2020.
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