[1] Karolinska Inst, Dept Med Huddinge, Div Hematol, S-14186 Stockholm, Sweden
[2] Karolinska Univ Hosp, Dept Hematol, S-14186 Huddinge, Sweden
[3] Oregon Hlth & Sci Univ, Div Infect Dis, Portland, OR 97201 USA
[4] Univ Washington, Seattle, WA 98195 USA
[5] Fred Hutchinson Canc Res Ctr, Vaccine & Infect Dis Inst, Seattle, WA 98109 USA