827 DEVELOPMENT OF AN ACCURATE NOMOGRAM PREDICTING THE PROBABILITY OF PROSTATE CANCER AT SATURATION BIOPSY IN PATIENTS WITH PREVIOUS NEGATIVE BIOPSIES - Ahyai, S.; Isbarn, H.; Zacharias, M.; Reichert, M.; Karakiewiez, P.; Thorsten, T.; Haese, A.; Steuber, T.; Graefen, M.; Chun, F.K.; Huland, H. (European Urology Supplements, 2009)