1 SaPeRiDoc-Documentation Centre on Perinatal and Reproductive Health, Regional Health Authority of Emilia-Romagna, Bologna, Italy. Electronic address: simona.dimario@regione.emilia-romagna.it.
2 SaPeRiDoc-Documentation Centre on Perinatal and Reproductive Health, Regional Health Authority of Emilia-Romagna, Bologna, Italy.
3 Local Health Authority of Reggio Emilia, Reggio Emilia, Italy.
4 Local Health Authority of Messina, Messina, Italy.