Affiliation: | (1) Department of Radiology, Blythdale Children's Hospital, Valhalla, New York;(2) Columbia-Presbyterian Medical Center, Columbia College of Physicians & Surgeons, Babies Hospital, 10032 New York, N. Y., USA;(3) Present address: Department of Health, Education and Welfare, Department of Maternal Child Health, Project 153, Washington, D. C. |