title: The National Heart and Lung Institute twin study of cardiovascular disease risk factors: organization and methodology.
mesh_terms: D000328:Adult; D001789:Blood Group Antigens; D003327:Coronary Disease / Q000235:genetics*; D004200:Diseases in Twins; D004777:Environment; D005260:Female; D014644:Genetic Variation; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011247:Pregnancy; D012306:Risk; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic
chemical_list: D001789:Blood Group Antigens