1. Institute of Social and Preventive Medicine, University of Bern, Switzerland /
Graduate School for Cellular and Biomedical Sciences, University of Bern, Switzerland
2. Institute of Social and Preventive Medicine, University of Bern, Switzerland / Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Switzerland
3. Institute of Social and Preventive Medicine, University of Bern, Switzerland
4. Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Switzerland
5. Swiss Tropical and Public Health Institute, Basel, Switzerland / University of Basel, Basel, Switzerland
6. Division of Respiratory Medicine, University Children’s Hospital Zurich and Children’s Research Centre, University of Zurich, Switzerland / University Children’s Hospital Basel (UKBB), Basel, Switzerland
7. Division of Paediatric Respiratory Medicine and Allergology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Switzerland / PEDNET, paediatric clinical trial unit, Children's University Hospital of Bern, University of Bern, Switzerland
8. Division of Respiratory Medicine, University Children’s Hospital Zurich and Children’s Research Centre, University of Zurich, Switzerland