title: A study of alcoholism in half siblings.
mesh_terms: D000328:Adult; D000437:Alcoholism / Q000235:genetics*; D002657:Child Development; D002668:Child Rearing; D004777:Environment; D005190:Family; D005260:Female; D005824:Genetics, Behavioral; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D010290:Parents