Abstract
To the Editor: Lichen planus (LP) is an inflammatory skin condition for which the epidemiology has not been well described. Prior estimates of LP prevalence range from 0.1% to 5% and have been limited by the use of non-US cohorts or the inclusion of only oral LP.1-4 Here, we estimate the prevalence of LP in All of Us, a database from the National Institutes of Health containing health information on a cohort of diverse Americans.5
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