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Kaplan-Meier survival curve shows the survival rates were 98.25% (95% CI, 88.19% to 99.75%) at 12 months, 92.98% (95% CI, 82.37% to 97.31%) at 24 months, 89.47% (95% CI, 78.06% to 95.13%) at 36 months, 84.21% (95% CI, 71.85% to 91.45%) at forty-eight months, and 72.49% (95% CI, 49.58% to 86.29%) at 60 months.
