Affiliation: | 1. Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA;2. Center for Fetal Diagnosis and Treatment, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA;3. Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA;4. Department of Pathology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA;5. Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, USA;6. Department of Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA |