1. Department of Radiology; University of Pittsburgh Medical Center; Pittsburgh Pennsylvania
2. Department of Pediatric Radiology; Children's Hospital of Pittsburgh of UPMC; Pittsburgh Pennsylvania
3. Department of Radiology; University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania
4. Department of Pediatric Radiology; University of Virginia; Charlottesville Virginia
5. Division of Neonatology; Department of Pediatrics; University of Miami; Miami Florida