1. Department of Pediatric Surgery at Wilford Hall USAF Medical Center, San Antonio, Texas and the Department of Radiology, Ultrasound Branch at Fitzsimmons USA Medical Center, Denver, Colorado
2. Department of Pediatric Radiology at Wilford Hall USAF Medical Center, San Antonio, Texas and the Department of Radiology, Ultrasound Branch at Fitzsimmons USA Medical Center, Denver, Colorado