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. 2009 Feb 17;100(4):608–610. doi: 10.1038/sj.bjc.6604912

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Copyright © 2009 Cancer Research UK

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Progression-free survival for the three groups of patients. (A) Kaplan–Meier estimates of probabilities of progression-free survival. Patients with no preoperative circulating prostatic cells (Neg PreOp CPC) and with preoperative circulating prostatic cells (Pos PreOp CPC) are compared, P<0.0001 by the log-rank test, χ²=16.02. (B) Kaplan–Meier estimates of probabilities of progression-free survival. Patient without preoperative circulating prostatic cells and with (Neg PreOp, Pos IntraOp CPC) or without (Neg PreOp, Neg IntraOp CPC) intraoperative prostatic circulating cells are compared, P=0.818, NS by the log-rank test, χ²=0.053.