Productive infection of bovine papillomavirus type 2 in the urothelial cells of naturally occurring urinary bladder tumors in cattle and water buffaloes. oleh Sante Roperto, Valeria Russo, Ayhan Ozkul, Annunziata Corteggio, Aylin Sepici-Dincel, Cornel Catoi, Iolanda Esposito, Marita G Riccardi, Chiara Urraro, Roberta Lucà, Dora M Ceccarelli, Michele Longo, Franco Roperto