1. University of Bern; Bern Switzerland
2. University Hospital Zurich; Zurich Switzerland
3. Stadtspital Triemli; Zurich Switzerland
4. Centre Hospitalier Universitaire Vaudois et Université de Lausanne; Lausanne Switzerland
5. Tiefenauspital Bern; Bern Switzerland
6. Inselspital/University Hospital Bern; Bern Switzerland
7. Hôpital de Neuchâtel; Neuchâtel Switzerland
8. University Hospital of Basel; Basel Switzerland
9. Praxis Römerhof; Olten Switzerland