Affiliation: | 1. Division of Neonatology of the Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, N. Y. USA;2. Division of Cardiology of the Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, N. Y. USA;3. Division of General Pediatrics of the Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, N. Y. USA;4. Department of Radiology, University of Rochester School of Medicine and Dentistry, Rochester, N. Y. USA |