1. Department of Maternal Neonatal Medicine, University of Parma, Parma, Italy
2. UOC of Obstetric Pathology, Departement of “Scienze della Salute della Donna, del Bambino e di Sanità Pubblica” Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
3. Obstetric Unit, Department of Medical and Surgical Sciences (DIMEC) IRCSS Sant’Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
4. Unità di Medicina Materno-Fetale, UOC Ginecologia ed Ostetricia University of Pisa, Pisa, Italy
5. Cardiology Department, University of Parma, Parma, Italy