1. Department of Pediatrics; Vanderbilt University School of Medicine; Nashville Tennessee
2. Independent Statistician; Chicago Illinois
3. Department of Pediatrics; Boston Medical Center/Boston University School of Medicine; Boston Massachusetts
4. Department of Paediatrics; Imperial College and the Biomedical Centre of Imperial College Healthcare NHS Trust; London United Kingdom
5. Department of Pediatrics; Case Western Reserve University School of Medicine, Rainbow Babies and Children's Hospitals, University Hospitals Case Medical Center; Cleveland Ohio
6. Brown School of Social Work, Washington University; St. Louis Missouri
7. University College London Institute of Child Health; London United Kingdom
8. Department of Paediatrics; North Middlesex Hospital NHS Trust; London United Kingdom
9. Department of Paediatrics; Evelina Children's Hospital, Guy's and St. Thomas' National Health Service Foundation Trust; London United Kingdom
10. Division of Allergy, Immunology and Pulmonary Medicine, Department of Pediatrics; Washington University School of Medicine; St. Louis Missouri