the effects of 12 weeks of intravesical instillation of bleomycin , cisplatinum and picibanyl on development of urinary bladder tumors and preneoplastic lesions were examined in rats pretreated with n-butyl-n- ( 4-hydroxybutyl ) -nitrosamine ( bbn ) for four weeks .
C0008838
cisplatinum
C0005695
of urinary bladder tumors