1. Division of Rheumatology Department of Internal Medicine III Medical University of Vienna Vienna Austria
2. Division of Molecular Medicine of Musculoskeletal Tissue University Hospital Muenster Muenster Germany
3. Department of Internal Medicine III University Erlangen-Nuremberg Erlangen- Nuremberg Germany
4. Department of Internal Medicine Nephrology, and Rheumatology University Hospital Muenster Muenster Germany
5. Institute of Molecular Biotechnology of the Austrian Academy of Sciences Vienna Austria
6. Radboud University Nijmegen Medical Centre Nijmegen The Netherlands
7. Center of Experimental Rheumatology University Hospital Zurich Zurich Switzerland
8. Operational Excellence Merck Serono International Geneva Switzerland