title: An epidemic of premature thelarche in Puerto Rico.
mesh_terms: D001940:Breast / Q000254:growth & development*; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011629:Puberty, Precocious / Q000139:chemically induced* / Q000453:epidemiology; D011647:Puerto Rico