1. National Institute of Health, Roma, Italy;
2. Department of Biomedicine and Prevention, University of Rome Tor Vergata, Roma, Italy;
3. Department of Biostatistical Unit, IRCCS-Regina Elena National Cancer Institute, Roma, Italy;
4. IRCCS Ospedale Pediatrico “Bambino Gesù”, Roma, Italy;
5. Department of Nursing Science and Midwifery, Sapienza University, Roma, Italy;
6. Department of Research Unit Nursing Science, Campus Bio-Medico di Roma University, Roma, Italy;
7. Local Health Authority “Roma 1”, Borgo Santo Spirito 3, Roma, Italy;
8. Department of Palliative Care and Pain Therapy Unit, Azienda ULSS n.4 Veneto Orientale, Roma, Italy