1. Department of Obstetrics and Neonatology, Prenatal Diagnosis Center & Researcher Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Reggio Emilia Italy
2. Department of Obstetrics and Gynecology, Fondazione Policlinico Tor Vergata, University of Tor Vergata, Rome, Italy University of Tor Vergata Rome Italy