1. Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital Basel, University of Basel, Basel, Switzerland
2. Department of Sport, Exercise and Health, Sports and Exercise Medicine, University of Basel, Basel, Switzerland
3. Division of Infectious Diseases, University Hospital Geneva, Geneva, Switzerland
4. Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St Gallen, St Gallen, Switzerland
5. Institute of Nursing Science, University of Basel, Basel, Switzerland
6. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
7. Department of Infectious Diseases, Bern University Hospital and University of Bern, Bern, Switzerland
8. Division of Infectious Diseases, University Hospital Lausanne, Lausanne, Switzerland
9. Division of Infectious Diseases, Regional Hospital of Lugano, Lugano, Switzerland
10. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel, University of Basel, Basel, Switzerland