[1] Natl Cheng Kung Univ Hosp, Tainan 70428, Taiwan
[2] Calif Pacific Med Ctr, San Francisco, CA USA
[3] Erasmus Univ Hosp, Rotterdam, Netherlands
[4] H22 Hosp, Buenos Aires, DF, Argentina
[5] Univ Santo Tomas, Manila, Philippines
[6] Yonsei Univ, Coll Med, Severance Hosp, Seoul, South Korea
[7] Armed Forces Inst Pathol, Washington, DC 20306 USA
[8] Bristol Myers Squibb Co, Pharmaceut Res Inst, Wallingford, CT 06492 USA