1. Comparative Immunogenetics Laboratory Department of Veterinary Pathobiology College of Veterinary Medicine and Biomedical Sciences Texas A&M University College Station TX USA
2. Department of Microbiology and Immunology School of Medicine University of Maryland at Baltimore Baltimore MD USA
3. Department of Microbial Pathogenesis and Immunology College of Medicine Texas A&M Health Science Center Texas A&M University College Station TX USA