1. Department of Gastrointestinal Medical Oncology and Digestive Diseases, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030.
2. Department of Gastrointestinal Medical Oncology and Digestive Diseases, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030 and Cancer Center, Sun Yat-sen University of Medical Sciences, Guangzhou, Guangdong 510060, The People's Republic of China.
3. Department of General Surgery, The Shanghai Medical University Affiliated Shanghai First People's Hospital, Shanghai 200080, The People's Republic of China.
4. Department of Gastrointestinal Surgery, Nanjing Medical University Affiliated Province Hospital, Nanjing, Jiangsu 210009, The People's Republic of China.
5. Department of Pathology, The Shanghai Medical University Affiliated Shanghai First People's Hospital, Shanghai 200080, The People's Republic of China.
6. Department of Gastrointestinal Medical Oncology and Digestive Diseases, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030 and Department of Cancer Biology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030.