[1] Fred Hutchinson Canc Res Ctr, Vaccine & Infect Dis Div, 1100 Fairview Ave N, Seattle, WA 98109 USA
[2] Univ Washington, Dept Pediat, Seattle, WA 98195 USA
[3] Seattle Childrens Hosp, Pediat Infect Dis Div, 4800 Sand Point Way NE,MA 7-226, Seattle, WA 98105 USA
[4] Univ Washington, Dept Med, Seattle, WA USA
[5] Fred Hutchinson Canc Res Ctr, Clin Res Div, 1124 Columbia St, Seattle, WA 98104 USA
[6] Univ Washington, Dept Biostat, Seattle, WA 98195 USA
[7] Univ Washington, Dept Lab Med, Seattle, WA 98195 USA