Affiliation: | aDepartment of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA;bDepartment of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA;cDepartment of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA |