[1] Univ Roma Tor Vergata, Dept Biomed & Prevent, Rome, Italy
[2] Univ Milan, Niguarda Hosp, Sch Nursing, Milan, Italy
[3] Wroclaw Med Univ, Dept Nursing & Obstet, Wroclaw, Poland
[4] Univ Turin, Dept Publ Hlth & Pediat Sci, Turin, Italy
[5] Univ Milan, Dept Biomed Sci Hlth, Milan, Italy