| Affiliation: | (1) the Section of Gastrointestinal Oncology and Digestive Diseases, Dept. of Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Box 78, 77030 Houston, TX;(2) Department of Medical Oncology, The University of Texas M.D. Anderson Cancer Center, 77030 Houston, Texas;(3) Department of General Surgery, The University of Texas M.D. Anderson Cancer Center, 77030 Houston, Texas;(4) Department of Cell Biology, The University of Texas M.D. Anderson Cancer Center, 77030 Houston, Texas;(5) Department of Pathology, The University of Texas M.D. Anderson Cancer Center, 77030 Houston, Texas |
