1. Nursing Science (INS) Department Public Health (DPH) Faculty of Medicine University of Basel Basel Switzerland
2. Department of Public Health and Social Affairs of the Canton of Vaud Lausanne Switzerland
3. Nursing Research Unit Inselspital Bern University Hospital Bern Switzerland
4. Faculty of Medicine University of Basel Basel Switzerland
5. Center for Primary Health Care University of Basel Basel Switzerland
6. University Department of Geriatric Medicine FELIX PLATTER Basel Switzerland