1 Cancer Pain and Palliative Medicine Service, Department of Medical Oncology, Shaare Zedek Medical Center, Jerusalem, Israel. Electronic address: [email protected].
2 Laboratory of Biostatistics, School of Health Sciences, National and Kapodistrian University of Athens, Athens; Frontier Science Foundation-Hellas, Athens, Greece.
3 Jules Bordet Institute, Université Libre de Bruxelles, Brussels, Belgium.
4 ESMO Head Office, European Society for Medical Oncology, Lugano, Switzerland.