[1] Emory Univ, Sch Med, Dept Pediat, Atlanta, GA 30322 USA
[2] Childrens Healthcare Atlanta, Atlanta, GA USA
[3] Vanderbilt Univ Sch Med, Dept Pathol Microbiol & Immunol, Nashville, TN USA
[4] Vanderbilt Univ Sch Med, Dept Pediat, Nashville, TN USA
[5] Vanderbilt Univ Sch Med, Vanderbilt Vaccine Ctr, Nashville, TN USA
[6] Univ Georgia, Coll Vet Med, Dept Pathol, Athens, GA 30602 USA
[7] Vanderbilt Univ, Sch Med, Dept Med, Nashville, TN 37235 USA
[8] Georgia State Univ, Atlanta, GA 30303 USA