Affiliation: | 1. Division of Respiratory Medicine, Department of Pediatrics, Inselspital and University of Bern, Bern, Switzerland;2. 3rd Pediatric Department, Aristotle University of Thessaloniki, Hippokration Hospital, Thessaloniki, Greece;3. University Children's Hospital Basel, UKBB, Basel, Switzerland;4. Department of Pediatrics, Respiratory Unit, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Switzerland;5. University Children's Hospital Zürich, Zürich, Switzerland |