Full text: Available Index: IMSEAR (South-East Asia) Main subject: Placebos / Time Factors / Aged / Female / Humans / Male / Smoking / Angioplasty, Balloon, Coronary / Randomized Controlled Trials as Topic / Sex Factors Type of study: Controlled clinical trial / Etiology study / Observational study / Prognostic study / Risk factors Country/Region as subject: Asia Language: English Year: 2002 Type: Article