1. Department of Ambulatory Care and Community Medicine, University of Lausanne, Lausanne, Switzerland;
2. Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA;
3. Institute of Family Medicine, University of Lausanne, Lausanne, Switzerland;
4. Division of Primary Care Medicine, Department of Community Medicine, Primary Care and Emergency Medicine, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland