1 Palliative Care, Pain Therapy, and Rehabiltation, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan 20133, Italy; European Palliative Care Research Center, Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: augusto.caraceni@istitutotumori.mi.it.