[1] Univ Roma Tor Vergata, Fac Med, Sch Nursing, Dept Biomed & Prevent, Via Montpellier 1, I-00133 Rome, Italy
[2] Azienda ULSS 4 Veneto Orientale, Dept Palliat Care, San Dona Di Piave, Italy
[3] Azienda ULSS 4 Veneto Orientale, Pain Therapy Unit, San Dona Di Piave, Italy
[4] Univ Aquila, Dept Life Hlth & Environm Sci, Laquila, Italy
[5] Campus Biomed Univ Rome, Res Unit Nursing Sci, Rome, Italy
[6] Ctr ANTEA, Rome, Italy
[7] Campus Biomed Univ Rome, Res Unit Hyg Stat & Publ Hlth, Rome, Italy