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Treatment‐use frequency during 2 years after first diagnosis of (a) alopecia areata (AA) (N = 61 899) or (b) AA severe subtypes (alopecia totalis [AT], alopecia universalis [AU], and alopecia ophiasis [AO], or widespread alopecia [WA]) (N = 1497). Patients must have been enrolled in the health insurance for 12 months after AA diagnosis, to assess treatment patterns. Data according to the Japan Medical Data Center Claims Database.
