1. University Medical Center Groningen, Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children’s Hospital, University of Groningen, Groningen, The Netherlands
2. Department of Pediatric Pulmonology, University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, The Netherlands
3. University Medical Center Groningen, Department of Clinical Pharmacy & Pharmacology, University of Groningen, Groningen, The Netherlands
4. University Medical Center Groningen, Department of Pulmonary Diseases and Tuberculosis, University of Groningen, Groningen, Netherlands
5. Amsterdam University Medical Centers, Department of Respiratory Medicine, University of Amsterdam, Amsterdam, The Netherlands
6. University Medical Center Groningen, Department of Epidemiology, University of Groningen, Groningen, The Netherlands
7. Department of Pharmacotherapy, -epidemiology and economics, Groningen Research Institute of Pharmacy, Unit of PharmacoTherapy, -epidemiology & -economics, University of Groningen, Groningen, The Netherlands