1. Carl von Ossietzky University Oldenburg Germany
2. German Rheumatism Research Centre Berlin Germany
3. University Medicine Carl Gustav Carus Technische Universität Dresden Dresden Germany
4. Barmer Institute for Health System Research and Barmer Statutory Health Insurance Fund Schwäbisch‐Gmünd Germany
5. University Medicine University Hospital, and Faculty of Medicine Carl Gustav Carus Technische Universität Dresden Dresden Germany