1. UniversitätsSpital Zürich, Rheumatology, Switzerland
2. Rheumatologie im Zürcher Oberland, Uster, Switzerland
3. Horten Centre for patient-oriented research and knowledge transfer, UniversitätsSpital Zürich, Zurich, Switzerland
4. Horten Centre for patient-oriented research and knowledge transfer, UniversitätsSpital Zürich, Zurich, Switzerland / Department of General Internal Medicine, Bern University Hospital, University of Bern, Switzerland
5. oikostat GmbH, Ettiswil, Switzerland
6. Ultraschallzentrum Rheumatologie, Basel, Switzerland
7. Zuger Kantonsspital, Rheumatology, Baar, Switzerland
8. RheumaClinic Bethanien, Zurich, Switzerland
9. Kantonsspital Winterthur, Rheumatology, Winterthur, Switzerland