1 Department of Surgery, Chicago Institute for Fetal Health, Ann and Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
2 Neonatal Surgical Unit, Medical and Surgical Department of the Fetus, Newborn and Infant, Bambino Gesù Children's Hospital, Rome, Italy.
3 Department of Maternal-Fetal Medicine, Duly Health and Care, Glen Ellyn, IL, USA.