1. Department of Ambulatory Care and Community Medicine, University of Lausanne, Lausanne, Switzerland
2. Division of Primary Care Medicine, Department of Community Medicine, Primary Care, and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland
3. Department of General Internal Medicine, Bern University Hospital, Bern, Switzerland
4. Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
5. Department of Medicine, University of Geneva, Geneva, Switzerland
6. Institute of Primary Health Care, University of Basel, Basel, Switzerland