1. Division of Infectious Diseases and Hospital Epidemiology; University Hospital Zurich; University of Zurich; Zurich; Switzerland
2. SHCS Data Center; University Hospital Lausanne; University of Lausanne; Lausanne; Switzerland
3. Institute of Social and Preventive Medicine; University of Bern; Bern; Switzerland
4. Division of Infectious Diseases; Bern University Hospital; University of Bern; Bern; Switzerland
5. Division of Infectious Diseases and Hospital Epidemiology; University Hospital Basel; Basel; Switzerland
6. Division of Infectious Diseases; University Hospital Lausanne; University of Lausanne; Lausanne; Switzerland
7. Division of Infectious Diseases; University Hospital Geneva; Geneva; Switzerland
8. Division of Infectious Diseases; Regional Hospital; Lugano; Switzerland
9. Division of Infectious Diseases; Cantonal Hospital of St. Gallen; St. Gallen; Switzerland
10. Center for Infectious Diseases; Clinic “im Park”; Zurich; Switzerland
11. Copenhagen HIV Programme; Copenhagen; Denmark