Conflicts of interest B.W.M.A., E.J.v.Z., O.H. and Z.F. have received compensation from King’s College London for their work on the GADA report featured in this article. B.W.M.A., E.J.v.Z. and O.H. are Associate Editors of the British Journal of Dermatology. C.F. is Director of the GADA project and Section Editor of the British Journal of Dermatology. He is also Chief Investigator of the UK National Institute for Health Research-funded TREAT (ISRCTN15837754) and SOFTER (ClinicalTrials.gov: NCT03270566) trials, the UK-Irish Atopic Eczema Systemic Therapy Register (A-STAR; ISRCTN11210918) and a Principal Investigator in the EU Horizon 2020-funded BIOMAP Consortium. He also leads the EU Trans-Foods consortium. His department has received funding from Sanofi Genzyme and Pfizer for skin microbiome work. He has also received compensation from the British Journal of Dermatology (reviewer and Section Editor) and EuroGuiDerm (guidelines lead).