1. Department of Biomedicine and Prevention, School of Nursing, Faculty of Medicine, University of Rome Tor Vergata, Rome, Italy
2. Department of Palliative Care and Pain Therapy Unit, Azienda ULSS n. 4 Veneto Orientale, San Donà di Piave, Italy
3. Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
4. Research Unit Nursing Science, Campus Bio-Medico University of Rome, Rome, Italy
5. Centro ANTEA, Rome, Italy
6. Research Unit Hygiene, Statistics and Public Health, Campus Bio-Medico University of Rome, Rome, Italy