1. 1Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy.
2. 2Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan.
3. 3Translational Research Support Office, National Cancer Center Hospital East, Kashiwa, Japan.
4. 4Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
5. 5Department of Oncology, Istituto Oncologico Veneto Istituto di Ricovero e Cura a Carattere Scientifico, Padua, Italy.
6. 6Unit of Medical Oncology 2, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy.
7. 7Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.
8. 8Medical Oncology Department, Vall d'Hebron Institute of Oncology, Barcelona, Spain.
9. 9Computational Oncology Group, Molecular Precision Oncology Program, National Center for Tumor Diseases (NCT) and German Cancer Research Center (DKFZ), Heidelberg, Germany.
10. 10Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy.
11. 11Foundation Medicine Inc, Cambridge, Massachusetts.
12. 12Department of Advanced Diagnostics, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
13. 13Marie-Josée and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York.