Marín, Belén Otero, Alicia Lugan, Séverine Espinosa, Juan Carlos Marín-Moreno, Alba Vidal, Enric Hedman, Carlos Romero, Antonio Pumarola, Martí Badiola, Juan J. Torres, Juan María Andréoletti, Oliver Bolea, Rosa Classical BSE prions emerge from asymptomatic pigs challenged with atypical/Nor98 scrapie Sci. rep. 10.1038/s41598-021-96818-2 2021 2021