[1] Univ Maryland, Sch Med, Inst Genomes Sci, Baltimore, MD 21201 USA
[2] Univ Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201 USA
[3] Ctr Dis Control & Prevent, Atlanta, GA 30333 USA
[4] Univ Calif Los Angeles, Med Ctr, Los Angeles Biomed Res Inst Harbor, Div Infect Dis, Torrance, CA 90502 USA
[5] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA