[1] Univ Hosp Padova, Dept Womens & Childrens Hlth, Padua, Italy
[2] Sanofi, Med, Via G Zanardelli 1, I-00186 Rome, Italy
[3] Univ Palermo, Dept Hlth Promot Sci Maternal & Infant Care Inter, Palermo, Italy
[4] Univ Hosp Infermi, Dept Pediat & Neonatol, Biella, Italy
[5] IRCCS Reggio Emilia, AUSL, Serv Prevenz & Sicurezza Negli Ambienti Lavoro SP, Dipartimento Sanita Pubbl, Reggio Emilia, Italy