Placebo-controlled or active-controlled trials for variant angina pectoris?
Ardissino
D
D
Savonitto
S
S
D000788:Angina Pectoris, Variant / Q000188:drug therapy*; D002986:Clinical Trials as Topic / Q000379:methods; D003692:Delayed-Action Preparations; D006801:Humans; D009543:Nifedipine / Q000627:therapeutic use*; D010919:Placebos; D012107:Research Design
D003692:Delayed-Action Preparations; D010919:Placebos; D009543:Nifedipine