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A. Percent pre-Stage 1 mortality in infants with hypoplastic left heart syndrome (HLHS) after arrival at a cardiac surgical center (CSC), by CSC, with HLHS volume (cases) on the x-axis, and mortality on the y-axis. B. Percent Stage 1 neonatal mortality by CSC, with HLHS volume on the x-axis, and mortality on the y-axis.
