[1] Nihon Univ, Sch Med, Dept Pathol & Microbiol, Div Microbiol, Tokyo 1738610, Japan
[2] Univ Tokyo, Grad Sch Med, Sch Int Hlth, Dept Dev Med Sci, Tokyo 1138654, Japan
[3] Nishimura Clin, Maizuru, Kyoto 6250036, Japan
[4] Chiang Mai Univ, Fac Med, Dept Microbiol, Chiang Mai 50000, Thailand
[5] Chiang Mai Univ, Fac Med, Dept Pediat, Chiang Mai 50000, Thailand
[6] Nakornping Hosp, Pediat Hematol Unit, Chiang Mai, Thailand
[7] Nihon Univ, Sch Med, Dept Pathol & Microbiol, Div Microbiol,Itabashi Ku, Tokyo 1738610, Japan