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Survival estimates of 376 patients with post polycythemia vera and post essential thrombocythemia myelofibrosis according to karyotype (normal versus abnormal). Median survival was 10.1 years (95% CI: 8.1-NR) in patients with NK and 6.1 years (95% CI 4.8-NR) in those with AK (P=0.012). Survival curves not overlapping the shaded region are significantly different at the 95% level.
