<qa>  What is the key eligibility criteria for atopic dermatitis?The key eligibility criteria are the following: patients with moderate or severe chronic atopic dermatitis, at least 18 years of age, with no current treatment for atopic dermatitis with active systemic medication or active topical treatment in the planned investigational area, and with no history of any significant disease that would affect the use of cis-UCA or comparator. 