1. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden;
2. Department of Paediatrics and Child Health and South African Medical Research Council Unit on Child and Adolescent Health, University of Cape Town, Cape Town, South Africa;
3. University Grenoble Alpes, Inserm U 1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Development and Respiratory Health, Institute for Advanced Biosciences, Grenoble, France;
4. Department of Respiratory Sciences, University of Leicester, Leicester, United Kingdom;
5. National Heart and Lung Institute, Centre for Paediatrics and Child Health, Imperial College London, London, United Kingdom;
6. Department of Pediatric Pulmonology and Pediatric Allergology, Groningen Research Institute for Asthma and COPD, University of Groningen, University Medical Center Groningen, Beatrix Children’s Hospital, Groningen, the Netherlands;
7. Department of Medicine and Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee;
8. Department of Pediatrics, University of Wisconsin, Madison, Wisconsin;
9. Indiana University, Indianapolis; and
10. Mayo Clinic, Phoenix, Arizona