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Figure 2 Six-month coronary angiography and revascularization (percutaneous transluminal angioplasty or coronary artery bypass grafting) use rates in first acute myocardial infarction (AMI) and unstable angina (UA) patients in tertiary and nontertiary hospitals (open bar, UA patients; solid bar, AMI patients; *p < 0.0001; based on reference 5 and present results).