Ministry of Health Key Laboratory;
China National Center for Food Safety Risk Assessment;
Beijing 100021;
China;
Department of Veterinary Pharmacology and Toxicology;
College of Veterinary Medicine;
China Agricultural University;
Beijing 100193;
China;
Southern Plains Agricultural Research Center;
Agricultural Research Service;
U.S. Department of Agriculture;
College Station;
Texas 77845-4988;
USA;
State Key Laboratory for Infectious Disease Prevention and Control;
National Institute for Communicable Disease Control and Prevention;
Chinese Center for Disease Control and Prevention;
Beijing 102206;
China;