1. Department of Biological Sciences, Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79902, USA
2. Department of Pediatrics, Division of Tropical Medicine, Baylor College of Medicine, Houston, TX 77030, USA
3. Texas Children’s Hospital Center for Vaccine Development, Houston, TX 77030, USA
4. Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA