title: Nifedipine and metoprolol in suspected unstable angina. Planning and conduct.
mesh_terms: D000787:Angina Pectoris / Q000188:drug therapy*; D000789:Angina, Unstable / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D006801:Humans; D008790:Metoprolol / Q000627:therapeutic use*; D009426:Netherlands; D009543:Nifedipine / Q000627:therapeutic use*; D011897:Random Allocation; D012107:Research Design
chemical_list: D008790:Metoprolol; D009543:Nifedipine