1 Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland.
2 Pediatric Pulmonology and Cystic Fibrosis Unit, Service of Pediatrics, Department Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland.
3 Pediatric Infectious Diseases Unit, Service of Pediatrics, Department Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland.