[1] Osaka Natl Hosp, Clin Res Inst, Chuo Ku, Osaka 5400006, Japan
[2] Osaka Natl Hosp, Dept Pediat, Osaka, Japan
[3] Osaka Natl Hosp, Dept Dermatol, Osaka, Japan
[4] Kansai Shinkyu Coll, Dept Anat, Kumatori, Osaka, Japan
[5] Kanagawa Canc Ctr, Clin Res Inst, Yokohama, Kanagawa, Japan
[6] Yokohama City Univ, Sch Med, Dept Pediat, Yokohama, Kanagawa, Japan
[7] Wakayama Med Coll, Dept Pediat, Wakayama, Japan
[8] Wakayama Med Coll, Dept Otorhinolaryngol, Wakayama, Japan
[9] Wakayama Med Coll, Dept Pathol 1, Wakayama, Japan
[10] Osaka Univ, Microbial Dis Res Inst, Dept Tumor Virol, Osaka, Japan