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Figure 5 Five-year actuarial survival rates (Kaplan-Meier method) after initial visit were 67% in group A, 91% in group B and 34% in group C. The survival rates were significantly different between the three groups. Log-rank statistics: chi-square value = 8.099, df = 2, p value = 0.0174. Abbreviations as in Figure 1.
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