1. Clinic of Respiratory Medicine and Pulmonary Cell Research, and
2. Department of Biomedicine, University of Basel, Basel, Switzerland
3. University of Basel, Basel, Switzerland
4. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel, University of Basel, Basel, Switzerland
5. Transplantation and Clinical Virology, Department of Biomedicine, University of Basel, Basel, Switzerland
6. Lindenhof Hospital, Bern, Switzerland
7. Pneumology Department, GIGA I3 research group, University of Liege, CHU Liege, Belgium; and
8. Swiss Tropical and Public Health Institute, Basel, Switzerland