1. National Heart and Lung InstituteImperial College London London UK
2. Imperial Clinical Trials Unit Imperial College London London UK
3. Division of Paediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
4. Faculty of Medicine Institute of Clinical Medicine University of Oslo Oslo Norway
5. Department of Dermatology Oslo University Hospital Oslo Norway
6. Allergy and Lung Health Unit Melbourne School of Population and Global Health University of Melbourne Melbourne VIC Australia
7. Department of Pediatrics School of Medicine and Public Health University of Wisconsin Madison WI USA
8. Center for Preventive Medical Sciences Chiba University Chiba Japan
9. Department of Midwifery and Women's Health Graduate School of Medicine The University of Tokyo Tokyo Japan
10. Allergy Center National Center for Child Health and Development Tokyo Japan
11. Department of Pediatrics Keio University School of Medicine Tokyo Japan
12. Sheffield Dermatology Research Department of Infection, Immunity & Cardiovascular Disease, The University of Sheffield Sheffield UK
13. Division of Nursing, Midwifery and Social Work School of Health Sciences The University of Manchester Manchester UK
14. Oregon Health & Science University Portland OR USA
15. Department of Dermatology and Allergy University Hospital Schleswig‐Holstein Campus Kiel Kiel Germany
16. Centre for Evidence‐Based Healthcare Medizinische Fakultät Carl Gustav Carus, TU Dresden Dresden Germany
17. Centre of Evidence Based Dermatology University of Nottingham Nottingham UK
18. Department of Dermatology University Hospital Zurich Zurich Switzerland
19. Department of Dermatology University Hospital Basel Basel Switzerland
20. NHMRC Clinical Trials Centre University of Sydney Camperdown NSW Australia
21. Nottingham Clinical Trials Unit Nottingham Health Science Partners Nottingham UK