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Flow chart for selection of the main study population and atopic dermatitis prevalent population. *Patients in these groups are mutually exclusive, with the order of priority being ‘atopic dermatitis’, then ‘eczema’ and then ‘dermatitis (other)’ plus personal/family history of atopy. That is, patients with recorded ‘atopic dermatitis’ are counted first, then those with recorded ‘eczema’ (and no recorded ‘atopic dermatitis’) and then the rest.
