[1] Univ Washington, Dept Med, Div Allergy & Infect Dis, Seattle, WA 98195 USA
[2] Univ Georgia, Dept Hlth Adm Biostat & Epidemiol, Athens, GA USA
[3] Univ Georgia, Dept Genet, Athens, GA 30602 USA
[4] Univ Maryland, Dept Med, Div Geograph Med, Baltimore, MD 21201 USA
[5] Univ Washington, Sch Med, Dept Med, Div Allergy & Infect Dis, Seattle, WA 98195 USA
[6] Univ Washington, Sch Med, Dept Microbiol, Div Allergy & Infect Dis, Seattle, WA 98195 USA
[7] Univ Alabama, Dept Epidemiol, Birmingham, AL USA
[8] Univ Alabama, Dept Med, Birmingham, AL 35294 USA
[9] Univ Alabama, Dept Microbiol, Birmingham, AL 35294 USA
[10] Johns Hopkins Univ, Dept Med, Div Infect Dis, Baltimore, MD USA
[11] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Mol Microbiol & Immunol, Baltimore, MD USA