[1] Seattle Childrens Hosp, Infect Dis, Seattle, WA USA
[2] Univ Washington, Pediat, Seattle, WA 98195 USA
[3] Fred Hutchinson Canc Res Ctr, 1124 Columbia St, Seattle, WA 98104 USA
[4] Fred Hutchinson Canc Res Ctr, Vaccine & Infect Dis Div, 1124 Columbia St, Seattle, WA 98104 USA
[5] Seattle Childrens Hosp, Seattle, WA USA