[1] Univ Tokyo, Res Hosp, Inst Med Sci, Dept Infect Dis & Appl Immunol,Minato Ku, Tokyo 1088639, Japan
[2] Univ Tokyo, Inst Med Sci, Adv Clin Res Ctr, Div Infect Dis, Tokyo 1088639, Japan
[3] Univ Tokyo, Res Hosp, Inst Med Sci, Dept Surg, Tokyo 1088639, Japan
[4] Univ Tokyo, Res Hosp, Inst Med Sci, Dept Lab Med, Tokyo 1088639, Japan