Abstract
ANN HILLBERG SEITZINGER,a,d KENNETH W. FORSYTHE, JR.,b AND MARY LISA MADELLc aCenters for Epidemiology and Animal Health, Veterinary Services, Animal and Plant Health Inspection Service, U.S. Department of Agriculture, Fort Collins, Colorado 80521, USA bCenters for Epidemiology and Animal Health, Fort Collins, Colorado 80521, USA cTrade Support Team, International Services, Animal and Plant Health Inspection Service, U.S. Department of Agriculture, Washington, D.C. 20250, USA
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