[1] Univ Texas Med Branch, Dept Biochem & Mol Biol, 301 Univ Blvd, Galveston, TX 77555 USA
[2] Duke Univ, Dept Mol Genet & Microbiol, Durham, NC 27710 USA
[3] Univ Texas Med Branch, Dept Neurosci & Cell Biol, 301 Univ Blvd, Galveston, TX 77555 USA
[4] Univ Texas Med Branch, Dept Obstet & Gynecol, 301 Univ Blvd, Galveston, TX 77555 USA
[5] Ctr Reg Invest Salud Publ INSP, 19 Poniente Esquina 4a Norte S-N, Tapachula 30700, Chiapas, Mexico
[6] Univ Texas Med Branch, Ctr Biodef & Emerging Infect Dis, Ctr Trop Dis, Dept Pathol, 301 Univ Blvd, Galveston, TX 77555 USA
[7] Univ Texas Med Branch, Inst Human Infect & Immun, 301 Univ Blvd, Galveston, TX 77555 USA
[8] Univ Texas Med Branch, Sealy Ctr Struct Biol & Mol Biophys, 301 Univ Blvd, Galveston, TX 77555 USA
[9] Duke NUS Med Sch, Programme Emerging Infect Dis, Singapore 169857, Singapore