Competing interests
All authors have completed the ICMJE uniform disclosure form at www.icmje.org/coi_disclosure.pdf and declare: grants from Jon Moulton Charity Trust, UK Medical Research Council, Spanish Society of Allergology and Clinical Immunology and Spanish Society of Paediatric Allergology, Asthma and Clinical Immunology. PJT reports additional grants from UK Medical Research Council, NIHR/Imperial BRC and UK Food Standards Agency during the conduct of the study; personal fees from UK Food Standards Agency, DBV Technologies, Aimmune Therapeutics, Allergenis, and ILSI Europe, outside the submitted work. RB reports funding from the Health Research Fund of Carlos III Health Institute (Spain), and honoraria for lectures from LETI Pharma. MVO reports additional research funding from the Health Research Fund of Carlos III Health Institute (Spain), and the FPIES Foundation. PRR reports funding from the Health Research Fund of Carlos III Health Institute, Foundation for Biomedical Research of the Niño Jesus University Children’s Hospital, and reports honoraria for consultancy and/or advisory board and/or lectures from ALK-Abello, FAES Pharma, LETI Pharma, Merck, Aimmune Therapeutics, Allergy Therapeutics, MEDA Pharma and NovartisDC. All other authors declare no competing interests.