title: Affected parent and age of onset in Huntington's chorea.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D005260:Female; D005298:Fertility; D006801:Humans; D006816:Huntington Disease; D008297:Male; D008875:Middle Aged; D012737:Sex Factors