1. Department of Oncology; Haukeland University Hospital; Bergen Norway
2. Department of Gastrointestinal Oncology; H. Lee Moffitt Cancer Center and Research Institute; Tampa Florida
3. Department of Nuclear Medicine and Endocrine Oncology; Gustave Roussy Institute; Villejuif France
4. Department of Pathology; Memorial Sloan-Kettering Cancer Center; New York New York
5. Department of Gastrointestinal Medical Oncology; The University of Texas MD Anderson Cancer Center; Houston Texas