1. Department of Integrative Molecular and Biomedical Science, Baylor College of Medicine, Houston, Texas, USA
2. Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
3. School of Biological and Physical Sciences, Northwestern State University, Natchitoches, Louisiana, USA
4. Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas, USA
5. Department of Medicine, Baylor College of Medicine, Houston, Texas, USA