Is acne a sign of normal puberty? A longitudinal study.
D000152:Acne Vulgaris / Q000453:epidemiology*; D000293:Adolescent; D000367:Age Factors; D002648:Child; D004739:England; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D011627:Puberty; D012737:Sex Factors; D012741:Sexual Maturation