[The twin studies in essential hypertension. Heredity and environment in essential hypertension].
D000328:Adult; D000368:Aged; D001794:Blood Pressure; D004200:Diseases in Twins; D004562:Electrocardiography; D004777:Environment; D005260:Female; D006801:Humans; D006973:Hypertension / Q000209:etiology* / Q000235:genetics*; D008297:Male; D008875:Middle Aged