1. Tissue Array Research Program, Laboratory of Pathology, Center for Cancer Research, Bethesda, Maryland
2. Digestive Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
3. Surgery Branch, Center for Cancer Research, Bethesda, Maryland
4. Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland