1. National Heart & Lung Institute, Section of Inflammation and Repair; Imperial 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 Australia
7. Department of Pediatrics; University of Wisconsin School of Medicine and Public Health; Madison Wisconsin 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. Centre of Evidence Based Dermatology; University of Nottingham; Nottingham UK
13. Department of Dermatology; University Hospital Zurich; Zurich Switzerland
14. Department of Dermatology; University Hospital Basel; Basel Switzerland
15. Sheffield Dermatology Research, Department of Infection, Immunity & Cardiovascular Disease; The University of Sheffield; Sheffield UK
16. Division of Nursing, Midwifery and Social Work, School of Health Sciences; The University of Manchester; Manchester UK
17. Center for Evidence-Based Healthcare; Faculty of Medicine Carl Gustav Carus, Technischen Universität (TU) Dresden; Dresden Germany
18. Department of Dermatology and Allergy; University Hospital Scheswig-Holstein; Kiel Germany
19. Department of Dermatology; Oregon Health & Science University; Portland Oregon USA
20. Nottingham Clinical Trials Unit; University of Nottingham; Nottingham UK
21. NHMRC Clinical Trials Centre; University of Sydney; Camperdown Australia