Chemopreventive effects of nimesulide, a selective cyclooxygenase-2 inhibitor, on the development of rat urinary bladder carcinomas initiated by N-butyl-N-(4-hydroxybutyl)nitrosamine. - Okajima,E.; Denda,A.; Ozono,S.; Takahama,M.; Akai,H.; Sasaki,Y.; Kitayama,W.; Wakabayashi,K.; Konishi,Y. (Cancer Res, 1998)