Preliminary Cytogenetic And Pharmacogenomic Analysis Of Muscle-Invasive Transitional-Cell Carcinoma (Tcc) Of The Bladder In Patients (Pts) Enrolled In The Italian National Research Council (Cnr) Phase Iii Randomized Trial Comparing Adjuvant Cisplatin-Gemcitabine (Pg) Vs Observation (Obs) After Radical Cystectomy