1. Digestive Diseases Branch (F.G., Y-J.C., K.H., L.K.E., B.A., R.T.J.), National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health (NIH)
2. Thoracic Oncology Section (D.S.S.), Surgery Branch, National Cancer Institute, NIH
3. Molecular Pathogenesis Unit, Surgical Neurology Branch (A.V., Z.Z., I.A.L.) National Institute of Neurological Disorders and Strokes, NIH
4. Nuclear Medicine Department (J.C.R.), Bethesda, Maryland 20892
5. Diagnostic Radiology Department (A.L.), Warren Grant Magnuson Clinical Center, NIH, Bethesda, Maryland 20892