[1] Chi Mei Med Ctr, Dept Pathol, Div Paediat Hematol Oncol, Ctr Canc, Yung Kang 710, Tainan County, Taiwan
[2] Buddhist Tzu Chi Med Ctr & Univ, Dept Pathol, Hualien, Taiwan
[3] Kyoto Prefectural Univ Med, Dept Paediat, Kyoto 606, Japan
[4] Takasago Seibu Hosp, Dept Paediat, Takasago, Hyogo, Japan
[5] Japanese Fdn Canc Res, Inst Canc, Dept Pathol, Tokyo 170, Japan
[6] Acad Sinica, Inst Biomed Sci, Taipei 115, Taiwan
[7] Taipei Med Univ, Taipei, Taiwan