Cytopathic bovine viral diarrhea viruses (BVDV): emerging pestiviruses doomed to extinction Ernst Peterhans, Claudia Bachofen, Hanspeter Stalder and Matthias Schweizer Vet. Res., 41 6 (2010) 44 Published online: 04 March 2010 DOI: 10.1051/vetres/2010016