Decline in the predicted incidence of Huntington's chorea associated with systematic genetic counselling and family support.
D005260:Female; D005817:Genetic Counseling; D006579:Heterozygote; D006801:Humans; D006816:Huntington Disease / Q000453:epidemiology* / Q000517:prevention & control; D008297:Male; D012306:Risk; D014852:Wales