1. Service of Infectious Diseases; Geneva University Hospitals and Faculty of Medicine; Geneva Switzerland
2. Orthopaedic Surgery Service; Geneva University Hospitals and Faculty of Medicine; Geneva Switzerland
3. Service of Internal Medicine; Geneva University Hospitals and Faculty of Medicine; Geneva Switzerland
4. Division of Therapeutic Education for Chronic Diseases; Geneva University Hospitals and Faculty of Medicine; Geneva Switzerland
5. Department of Medicine; University of Oxford; Oxford UK