title: Prevalence of nodulocystic acne in white and Negro males.
mesh_terms: D000152:Acne Vulgaris / Q000453:epidemiology / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D044383:Black People; D006801:Humans; D008297:Male; D011330:Prisons; D011336:Probability; D044465:White People