[1] Univ Iowa, Dept Internal Med, Iowa City, IA 52242 USA
[2] Iowa City VA Healthcare Syst, Iowa City, IA USA
[3] Baylor Coll Med, Dept Med, Houston, TX 77030 USA
[4] Baylor Coll Med, Dept Mol Virol & Microbiol, Houston, TX 77030 USA
[5] Cincinnati Childrens Hosp, Gamble Program Clin Studies, Cincinnati, OH USA
[6] Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201 USA
[7] EMMES Corp, Rockville, MD USA
[8] Vanderbilt Univ, Dept Pediat, Nashville, TN 37235 USA
[9] St Louis Univ, Dept Internal Med, St Louis, MO 63103 USA
[10] Duke Univ, Sch Med, Dept Pediat, Durham, NC USA