[1] Ctr Dis Control & Prevent, Meningitis & Vaccine Preventable Dis Branch, Atlanta, GA 30333 USA
[2] Georgia Inst Technol, Sch Biol, Atlanta, GA 30332 USA
[3] Georgia Inst Technol, Computat Genom Grp, Atlanta, GA 30332 USA
[4] PanAmer Bioinformat Inst, Santa Marta, Magdalena, Colombia
[5] CDC, Biotechnol Core Facil Branch, Div Sci Resources, NCPDCID, Atlanta, GA 30333 USA