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We thank Dr Tkach for writing to clarify the distinction between incidence and prevalence. The word prevalence should have been used to describe the percent of persons in our series who were affected with vitiligo at the time of the study.
Carter DM, Jegasothy BV. Incidence vs Prevalence-Reply. Arch Dermatol. 1977;113(12):1731. doi:10.1001/archderm.1977.01640120099032