William A. Engle, Mervyn D. Cohen, William H. McAlister, N. Thorne Griscom
Section of Neonatal-Perinatal Medicine, Departments of Pediatrics and Pediatric Radiology, Indiana University School of Medicine and the James Whitcomb Riley Hospital for Children, Indianapolis, Indiana; the Department of Radiology, Harvard Medical School and the Children's Hospital-Boston, Boston, Massachusetts; and the Mallinckrodt Institute of Radiology, Washington University, St. Louis, Missouri
