1. Department of Molecular Microbiology & Immunology, South Texas Center for Emerging Infectious Diseases, The University of Texas at San Antonio, San Antonio, TX 78249, USA
2. Department of Healthcare Sciences, University of The Incarnate Word, San Antonio, TX 78209, USA
3. Department of Medicine, Division of Infectious Diseases, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
4. Department of Biology, Texas Christian University, Fort Worth, TX 76129, USA
5. Department of Pathology and Laboratory Medicine, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA