1 Division of Infectious Diseases, Department of Medicine, University of Texas Medical Branch, Galveston, Texas, USA.
2 Virology Department, National Institute of Veterinary Research, Hanoi, Vietnam.
3 Institute for Translational Science, University of Texas Medical Branch, Galveston, Texas, USA.
4 Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA.
5 Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, USA.
6 Department of Global Health and Emerging Diseases, School of Public and Population Health, University of Texas Medical Branch, Galveston, Texas, USA.