1. Anesthesia and Intensive Care & Pain Relief and Supportive Care, La Maddalena Cancer Center and University of Palermo, Palermo, Italy;
2. ‘L’Aquila per la Vita’ Home Care Unit and Department of Applied Clinical Sciences and Biotechnology, University of L’Aquila, L’Aquila, Italy;
3. Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L’Aquila, L’Aquila, Italy;
4. University of L’Aquila, L’Aquila, Italy