IGHE and atopic eczema: The analysis included demographic (age, sex), pre‐treatment (reported at qualification: oral glucocorticosteroids use, total IgE serum level, peripheral blood eosinophilia, co‐morbidities: atopic dermatitis, chronic allergic rhinitis or sinusitis) and treatment‐related data (treatment time, current treatment status, reason for early termination of therapy, year of discontinuation, rediagnostics, requalification).