1. Division of Rheumatology Internal Medicine III Medical University of Vienna Vienna Austria
2. Department of Rheumatology Radboud University Nijmegen Medical Centre Nijmegen The Netherlands
3. Division of Rheumatology Department of Medicine New York University School of Medicine New York NY USA
4. Medical Inflammation Research Department of Medical Biochemistry and Biophysics Karolinska Institute Stockholm Sweden
5. Department of Dermatology University Hospital Erlangen Friedrich‐Alexander University of Erlangen‐Nürnberg Erlangen Germany
6. Department of Internal Medicine 3 ‐ Rheumatology and Immunology Friedrich‐Alexander‐University Erlangen‐Nürnberg (FAU) Erlangen Germany
7. Ludwig Boltzmann Cluster for Arthritis and Rehabilitation Vienna Austria