1. Faculty of Nutrition, Texas A&M University, College Station, TX 77843-2471
2. Department of Gastrointestinal Medical Oncology and Digestive Diseases, Division of Medicine
3. Department of Clinical Investigation, Community Oncology Program, The University of Texas MD Anderson Cancer Center, Houston, TX 77030
4. Cancer Nutritional Epidemiology Unit, The University of Texas School of Public Health, Houston, TX 77030