Association between the number of dissected lymph nodes during pelvic lymphadenectomy and cancer-specific survival in patients with lymph node-negative urothelial carcinoma of the bladder undergoing radical cystectomy

May M, Herrmann E, Bolenz C, Brookman-May S, Tiemann A, Moritz R, Fritsche H-M, Burger M, Trojan L, Michel MS, Wülfing C, Müller SC, Ellinger J, Buchner A, Stief CG, Tilki D, Wieland WF, Gilfrich C, Höfner T, Hohenfellner M, Haferkamp A, Roigas J, Zacharias M, Bastian PJ