1. Channing Division of Network Medicine Brigham and Women's Hospital and Harvard Medical School Boston Massachusetts USA
2. Division of Allergy and Clinical Immunology Brigham and Women's Hospital and Harvard Medical School Boston Massachusetts USA
3. Department of Pediatrics University of Alberta Edmonton Alberta Canada
4. Department of Pediatrics University of British Columbia Vancouver British Columbia Canada
5. Department of Pediatrics & Physiology Hospital for Sick Children, University of Toronto Toronto Ontario Canada
6. COPSAC, Copenhagen Prospective Studies on Asthma in Childhood Herlev and Gentofte Hospital, University of Copenhagen Gentofte Denmark
7. Department of Clinical Science Kaiser Permanente Bernard J. Tyson School of Medicine Pasadena California USA
8. Pulmonary Center and Department of Medicine Boston University School of Medicine Boston Massachusetts USA
9. Department of Pediatrics Boston Medical Center Boston Massachusetts USA
10. Division of Pediatric Allergy, Immunology and Pulmonary Medicine, Department of Pediatrics Monroe Carell Jr Children's Hospital at Vanderbilt University Medical Center Nashville Tennessee USA
11. Division of Pediatric Allergy, Immunology and Pulmonary Medicine, Department of Pediatrics Washington University School of Medicine, St Louis, MO and St Louis Children's Hospital St Louis Missouri USA
12. The Kipper Institute of Allergy and Immunology Schneider Children's Medical Center of Israel, Tel Aviv University Israel
13. Department of Environmental Health Harvard T.H. Chan School of Public Health Boston Massachusetts USA
14. Division of Pediatric Pulmonary Medicine Golisano Children's Hospital at Strong, University of Rochester Medical Center Rochester New York USA