1. Division of Pediatric Respiratory Medicine and Allergology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern , Bern, Switzerland
2. Graduate School for Health Sciences, University of Bern , Bern, Switzerland
3. Institute of Primary Health Care (BIHAM), University of Bern , Bern, Switzerland
4. Graduate School for Biomedical Science, University of Bern , Bern, Switzerland
5. University Children's Hospital Basel (UKBB) , Basel, Switzerland
6. Allergology, Department of Medicine, Lucerne Cantonal Hospital and University of Lucerne , Lucerne, Switzerland
7. Department for BioMedical Research (DBMR), University of Bern , Bern, Switzerland