Study to Evaluate Efficacy and Safety of PF-04965842 in Subjects Aged 12 Years And Older With Moderate to Severe Atopic Dermatitis

Inclusion Criteria:

   - 12 years of age or older with a minimum body weight of 40 kg

   - Diagnosis of atopic dermatitis (AD) for at least 1 year and current status of moderate
   to severe disease (>= the following scores: BSA 10%, IGA 3, EASI 16, Pruritus NRS 4)

   - Recent history of inadequate response or inability to tolerate topical AD treatments
   or require systemic treatments for AD control

Exclusion Criteria:

   - Unwilling to discontinue current AD medications prior to the study or require
   treatment with prohibited medications during the study

   - Prior treatment with JAK inhibitors

   - Other active nonAD inflammatory skin diseases or conditions affecting skin

   - Medical history including thrombocytopenia, coagulopathy or platelet dysfunction, Q
   wave interval abnormalities, current or history of certain infections, cancer,
   lymphoproliferative disorders and other medical conditions at the discretion of the
   investigator

   - Pregnant or breastfeeding women, or women of childbearing potential who are unwilling
   to use contraception