RecruitingCorEvitas International Adolescent Alopecia Areata (AA) Drug Safety and Effectiveness RegistryProspective observational registry focusing on an adolescent cohort diagnosed with severe alopecia areata,receiving routine care from dermatology providers. Visit schedules for patients will be determined by the provider in accordance with routine clinical care, and any prescriptions provided to patients will adhere to product availability and local prescribing guidelines/regulations in the country where the participating registry site is located.