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Figure 4 Kaplan-Meier survival in 163 patients with left atrial isomerism and a normal heart (n = 22), a heart suitable for biventricular repair (n = 71) and a heart suitable for single-ventricle surgery (n = 70). Survivors are denoted by dots. Vertical bars represent 95% confidence limits. Differences between groups were analyzed using the log-rank and Wilcoxon tests.