Efficacy of nifedipine in combination treatments for angina.
D000787:Angina Pectoris / Q000188:drug therapy*; D001262:Atenolol / Q000008:administration & dosage*; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D009543:Nifedipine / Q000008:administration & dosage*
D001262:Atenolol; D009543:Nifedipine