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. 2021 Jul 31;113(3):738–746. doi: 10.1016/j.athoracsur.2021.07.015

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© 2021 by The Society of Thoracic Surgeons.

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Mortality observed/expected (O/E) ratios for (A) all risk-adjustable operations and for (B) isolated coronary artery bypass grafting in the Mid-Atlantic and New England regions vs all other regions.