[1] Natl Taiwan Univ Hosp, Dept Oncol, Taipei, Taiwan
[2] Natl Cheng Kung Univ Hosp, Tainan 70428, Taiwan
[3] China Med Univ Hosp, Taichung, Taiwan
[4] SUNY Upstate Med Univ, Syracuse, NY USA
[5] Boehringer Ingelheim Pharmaceut Inc, Ridgefield, CT USA
[6] Boehringer Ingelheim GmbH & Co KG, Bracknell, Berks, England
[7] Mem Sloan Kettering Canc Ctr, New York, NY 10021 USA