Eligibility Criteria for patients:  Inclusion Criteria:  Patients with stable CAD according to the National Cardiovascular Data Registry (NCDR) CathPCI criteria (stable angina, no or silent myocardial ischemia) and angiographically confirmed 3-vessel disease or left main disease.  Exclusion Criteria:  prior percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG); cardiac troponin I (CTnI) greater than the local laboratory upper limit of normal or recent myocardial infarction with CTnI levels still elevated; concomitant severe valvular disease, macrovascular disease, or huge ventricular aneurysm requiring surgery; concomitant atrial fibrillation or severe arrhythmia  Eligibility Criteria for specialists:  Inclusion Criteria for interventional cardiologists:  Annual PCI volume ≥200 Annual left main PCI volume ≥25 Capable of chronic total occlusion(CTO) PCI Clinical researcher experience in coronary revascularization Proficient in clinical guidelines  Inclusion Criteria for cardiac surgeons:  CABG total volume ≥200 Proficient in both on-pump and off-pump CABG Clinical researcher experience in coronary revascularization Proficient in clinical guidelines  Inclusion Criteria for non-interventional cardiologists:  1) Proficient in clinical guidelines