1 Cancer Pain and Palliative Medicine Service, Department of Medical Oncology, Shaare Zedek Medical Center, Jerusalem, Israel. Electronic address: chernyn@netvision.net.il.
2 Laboratory of Biostatistics, School of Health Sciences, National and Kapodistrian University of Athens, Athens, Greece; Frontier Science Foundation-Hellas, Athens, Greece.
3 ESMO Head Office, Lugano, Switzerland.
4 Jules Bordet Institute, Université Libre de Bruxelles, Brussels, Belgium.
6 Department of Oncology, Division of Cancer Care and Epidemiology, Queen's University, Kingston, Canada; Department of Public Health Sciences, Division of Cancer Care and Epidemiology, Queen's University, Kingston, Canada.
7 Department of Medical Oncology, University Medical Center Groningen, University of Groningen, Groningen, The netherlands.