1. Department of Nuclear Medicine (R.A.), University Hospital of Brest, 29200 Brest, France;
2. Department of Nuclear Medicine and Endocrine Tumors (S.L., D.D., J.L., M.S., E.B.), Institut Gustave Roussy, Universite Paris Sud, 94800 Villejuif, France;
3. Department of Epidemiology (A.A.), Institut Gustave Roussy, 94800 Villejuif, France;
4. Department of Radiology (C.D., T.d.B.), Institut Gustave Roussy, 94800 Villejuif, France;
5. Department of Pathology (P.D.), Institut Gustave Roussy, 94800 Villejuif, France;
6. Department of Oncologic Surgery (D.E.), Institut Gustave Roussy, Universite Paris Sud, 94800 Villejuif, France
7. Department Medical Oncology (J.G.), Institut Gustave Roussy, Universite Paris Sud, 94800 Villejuif, France
8. Department Digestive Oncology (M.D.), Institut Gustave Roussy, Universite Paris Sud, 94800 Villejuif, France