title: Letter: Natural history of angina pectoris.
mesh_terms: D000787:Angina Pectoris / Q000188:drug therapy* / Q000401:mortality* / Q000601:surgery; D006801:Humans; D007548:Isosorbide Dinitrate / Q000627:therapeutic use; D005996:Nitroglycerin / Q000627:therapeutic use; D011379:Prognosis; D011433:Propranolol / Q000627:therapeutic use; D012306:Risk
chemical_list: D011433:Propranolol; D005996:Nitroglycerin; D007548:Isosorbide Dinitrate