[1] Univ Washington, Fred Hutchinson Canc Res Ctr Vaccine, Dept Pediat, 1100 Fairview Ave North, Seattle, WA 98109 USA
[2] Div Seattle Childrens Hosp, Dept Infect Dis, Seattle, WA USA
[3] St Jude Childrens Res Hosp, 262 Danny Thomas Pl Mail Stop 230, Memphis, TN 38105 USA