1. Department of Obstetrics and Gynaecology, Guastalla Civil Hospital, AUSL Reggio Emilia, Reggio Emilia, Italy
2. Department of Obstetrics and Gynecology, Ribeirão Preto School of Medicine, São Paulo University (FMRP-USP), Ribeirão Preto-SP, Brazil
3. Department of Obstetrics and Gynecology, Baylor College of Medicine and Texas Children's Fetal Center, Houston, Texas, United States
4. Department of Obstetrics, Paulista School of Medicine, Federal University of São Paulo (EPM-UNIFESP), São Paulo-SP, Brazil