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Forest Plot of mortality outcome in percutaneous coronary intervention (PCI) versus coronary artery bypass surgery (CABG) for unprotected left main coronary artery disease (ULMCAD). Forest plot shows the odd ratio (OR) of mortality in PCI versus CABG during in hospital follow-up (A), 30-day follow-up (B), long-term follow-up ≥1 year (C), and subgroup ≥ 5 years follow-up (D).
