1. University of Zurich
2. University of Zurich and University Hospital of Zurich
3. University Department of Geriatric Medicine Felix Platter & University of Basel
4. Geneva University Hospitals
5. Hausarztpraxis Brauereistrasse, Uster, Switzerland
6. Cantonal Hospital Olten, Solothurner Spitäler AG
7. University Insel Hospital, Basel University
8. ACOMED Statistik
9. ZEG
10. CSL Vifor
11. University of Zurich, University Hospital Basel (Clinic for Psychosomatic Diseases), Merian Iselin Klinik