Medical Oncology Department, Gastrointestinal and Endocrine Tumor Unit, Vall d'Hebron, University Hospital, Barcelona, Spain. Electronic address: jacapdevila@vhebron.net. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, London, UK. Medical Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy. Davidoff Cancer Center, Tel Aviv Medical School Sackler, Israel. Renal Transplant Unit, Nephrology Department, Hospital Universitari Vall d'Hebron. Autonomous University of Barcelona, Barcelona, Spain. Head of Cardiology, University Hospital Ramón y Cajal, Madrid, Spain. Department of Nuclear Medicine, Otto-von-Guericke-University/Medical Faculty, Department of Radiology and Nuclear Medicine, Magdeburg, Germany. Endocrinology Department University Hospital Puerta de Hierro, Madrid, Spain. Medical Oncology Department, MD Anderson Cancer Center Madrid, Spain.