[1] Natl Univ Singapore, Singapore, Singapore
[2] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Seoul, South Korea
[3] Nagoya Univ Hosp, Nagoya, Aichi, Japan
[4] Chi Mei Med Ctr, Taipei, Taiwan
[5] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[6] Aichi Med Univ Hosp, Nagakute, Aichi, Japan