title: Letter: Propranolol and digoxin for angina pectoris.
mesh_terms: D000787:Angina Pectoris / Q000188:drug therapy*; D004077:Digoxin / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D006801:Humans; D005996:Nitroglycerin / Q000627:therapeutic use; D011433:Propranolol / Q000627:therapeutic use*
chemical_list: D004077:Digoxin; D011433:Propranolol; D005996:Nitroglycerin