1. University of Minnesota Swine Disease Eradication Center; 385C Animal Science/Veterinary Medicine Building, 1988 Fitch Avenue St Paul MN 55108 USA
2. University of Minnesota Department of Agricultural Engineering and Biosystems Room; 1930 Eckles Avenue St Paul MN 55108 USA
3. Minnesota Veterinary Diagnostic Laboratory; 1333 Gortner Avenue St Paul MN 55108 USA