Affiliation: | (1) Virginia-Maryland Regional College of Veterinary Medicine, University of Maryland, College Park, MD 20742, USA;(2) National Institute of Allergy and Infectious Diseases, National Institutes of Health, Laboratory of Infectious Diseases, Bethesda, MD 20892, USA;(3) Virginia-Maryland Regional College of Veterinary Medicine, University of Maryland, College Park, MD 20742, USA |