Penbutolol in black hypertensive patients.
D044383:Black People; D002986:Clinical Trials as Topic; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D010394:Penbutolol / Q000627:therapeutic use*; D011412:Propanolamines / Q000627:therapeutic use*
D011412:Propanolamines; D010394:Penbutolol