Article AbstractBecause this piece does not have an abstract, we have provided for your benefit the first 3 sentences of the full text.Sir: Trichotillomania is an impulse control disorder characterized by compulsive hairpulling. While the incidence of hairpulling is quite high in some populations, full criteria for trichotillomania are met by less than 1% of the population.1-3 Severe cases can lead to bald patches and marked social disability.
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Coric et al. (2007) studied this question.