1. Department of Microbial Pathogenesis and Immunology, Texas A&M University, College Station, Texas, USA
2. Deparment of Biomedical Sciences, Marshall University, Huntington, West Virginia, USA
3. Interdisciplinary Program in Genetics, Texas A&M University, College Station, Texas, USA
4. Department of Microbiology and Immunology, UT Southwestern Medical Center, Dallas, Texas, USA
5. Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
6. Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M, College Station, Texas, USA