[1] Univ Genoa, Dept Hlth Sci, Via Pastore 1, I-16132 Genoa, Italy
[2] Natl Social Secur Council ENPAPI, Rome, Italy
[3] Ordine Profess Infermierist Roma, Rome, Italy
[4] Azienda USL IRCCS Reggio Emilia, Qualitat Res Unit, Emilia, Italy
[5] Univ Hull, Sch Hlth Social Work, Kingston Upon Hull, N Humberside, England