Division of Medical Oncology, USC Norris Comprehensive Cancer Center, Los Angeles, CA. Electronic address: lenz@usc.edu. Medical Oncology Department, Vall d'Hebron University Hospital and Institute of Oncology (VHIO), Universitat Autònoma de Barcelona, Barcelona, Spain. Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Chiba, Japan. Phase 1 Trial Unit and Medical Oncology Unit 1, Istituto Oncologico Veneto IRCCS, Padova, Italy. Department of Oncology, University of Pisa, Pisa, Italy. Medical Oncology Department, Hospital Universitario Virgen del Rocio, Sevilla, Spain. Medical Oncology 1, Ospedale Policlinico San Martino IRCCS, Genova, Italy. TA CNS Retinopathies Emerging Areas, Boehringer Ingelheim International GmbH, Ingelheim, Germany. Biostatistics and Data Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany. TA Oncology, Boehringer Ingelheim International GmbH, Ingelheim, Germany. Digestive Oncology, University Hospitals Leuven and KULeuven, Leuven, Belgium.