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