1. Pain and Palliative Care Research Unit; Oncology Department; IRCCS Istituto di Ricerche Farmacologiche Mario Negri; Milan Italy
2. Academic Unit of Palliative Care; Leeds Institute of Health Sciences; School of Medicine; University of Leeds; Leeds U.K.
3. Methodology for Clinical Research Laboratory; Oncology Department; IRCCS Istituto di Ricerche Farmacologiche Mario Negri; Milan Italy
4. Struttura Operativa Complessa di Medicina; Ospedale San Polo; AAS 2 Bassa Friulana Isontina; Monfalcone Italy