[1] Univ Milan, Dept Clin Sci & Community Hlth, Doctoral Programme Publ Hlth Sci, Via Vanzetti 5, I-20133 Milan, Italy
[2] Univ Udine, Dept Med Sci, Sch Nursing, Viale Ungheria 20, I-33100 Udine, Italy
[3] San Paolo Teaching Hosp, Sch Nursing, Via Ovada 26, I-20142 Milan, Italy
[4] Udine Teaching Hosp, Dept Anesthesia & Intens Care, Piazzale Santa Maria della Misericordia 15, I-33100 Udine, Italy
[5] Univ Milan, Sch Nursing, Dept Biomed Sci Hlth, Via Pascal 36, I-20133 Milan, Italy