Simultaneous presence of bovine papillomavirus in blood and in short-term lymphocyte cultures from dairy cattle in Pernambuco, Brazil - Diniz, N; Melo, T. C; Santos, J. F; Mori, E; Brandão, Paulo Eduardo; Richtzenhain, Leonardo José; Freitas, A. C; Becak, W; Carvalho, R. F; Stocco, R. C (Genetics and Molecular Research, 2009)