Batista L, Dee S A, Rossow K D, Polson D D, Xiao Z, Olin M, Murtaugh M P, Molitor T W, Joo H S, Pijoan C
Swine Disease Eradication Center, Room 385C, University of Minnesota College of Veterinary Medicine, 1988 Fitch Avenue, St Paul, MN 55108, USA.
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