Characteristics of controls: sex, age, atopic dermatitis, total IgE (KU/L), sIgE (KU/L) against wheat flour, rye flour, gluten, gliadins, ω5‐gliadin, lipid‐transfer protein, dermatophagoides pteronyssinus, timothy grass, birch pollen allergen. This evidence concerns the gene IGHE and atopic eczema.