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Interpretation of a Kaplan-Meier curve (based on Mah D, Singh TP, Thiagarajan RR, et al. Incidence and risk factors for mortality in infants awaiting heart transplantation in the USA. J Heart Lung Transplant. 2009;28(12):1292–1298; ticks/ notches are added to the original curve for educational purposes) ECMO=extracorporeal membrane oxygenation.
