1. School of Health Sciences; University of Tampere; Tampere Finland
2. Allergy & Respiratory Research Group; Center for Population Health Sciences; The University of Edinburgh; Edinburgh UK
3. Institute for Medical Informatics, Biometry and Epidemiology; University of Munich; Munich Germany
4. David Hide Asthma and Allergy Research Centre; St Mary's Hospital; Newport Isle of Wight UK
5. NIHR Southampton Respiratory Biomedical Research Unit; University of Southampton and University Hospital Southampton NHS Foundation Trust; Southampton UK
6. Human Development and Health and Clinical Experimental Sciences Academic Unit; Faculty of Medicine; University of Southampton; Southampton UK
7. Department of Pediatrics; Center for Food Allergy Diagnosis and Treatment; University of Padua; Veneto Region Italy
8. Division of General Internal Medicine and Primary Care; Brigham and Women's Hospital; Boston MA USA
9. Department of Medicine; Harvard Medical School; Boston MA USA