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.
5 Medical Oncology Department, Ioannina University Hospital, Ioannina, Greece.
6 Medical Oncology Department, Vall d'Hebron University Hospital and Institute of Oncology (VHIO), Universitat Autònoma de Barcelona, Barcelona, Spain.
7 Division of Oncology, Medical University Vienna, Vienna, Austria.
8 Jules Bordet Institute, Universite Libre de Bruxelles, Brussels, Belgium.
9 Department of Medical Oncology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.