1. Department of Pediatrics, University of Utah School of Medicine, Primary Children’s Hospital, Salt Lake City, Utah
2. Department of Pediatrics, Stanford University School of Medicine, Palo Alto, California
3. Division of Pediatric Hospital Medicine, Baylor College of Medicine, Texas Children’s Hospital, Houston, Texas
4. Department of Neonatology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
5. Departments of Pediatrics, Emergency Medicine, and Radiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
6. Department of Pediatrics, Virginia Commonwealth University, Richmond, Virginia
7. University of Maryland School of Medicine and VA Maryland Health care System, Baltimore, Maryland
8. UCSF School of Medicine and San Francisco VA Medical Center, San Francisco, California