Different prion disease phenotypes result from inoculation of cattle with two temporally separated sources of sheep scrapie from Great Britain. - Konold T; Lee YH; Stack MJ; Horrocks C; Green RB; Chaplin M; Simmons MM; Hawkins SA; Lockey R; Spiropoulos J; Wilesmith JW; Wells GA (BMC veterinary research, 2006)