1. Division of Emergency Medicicine; University of California Los Angeles; 924 Westwood Boulevard, Suite 300 Los Angeles CA 90095
2. Department of Gastroenterology and Hepatology; Mayo Clinic; Rochester Minnesota
3. Department of Surgery-Emergency Medicine; Lucile Packard Children's Hospital at Stanford University School of Medicine; 725 Welch Road, Room 1690 Stanford CA 94305-5913
4. Department of Pediatric Radiology; Lucile Packard Children's Hospital at Stanford University School of Medicine; 725 Welch Road, Room 1690 Stanford CA 94305-5913