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Kaplan-Meier survival analysis of men with clinically localized prostate cancer found to have <15% positive lymph nodes. The analysis is stratified by extent of lymph node dissection (extended lymphadenectomy n = 50, limited lymphadenectomy n = 12; log-rank P = .01). The number of patients at risk at the beginning of each time interval is displayed. Reprinted from Allaf ME et al,14 with permission from the American Urological Association.
