1. Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, California
2. Department of Preventive Medicine, University of Southern California, Los Angeles
3. Keck School of Medicine, Department of Surgery, University of Southern California, Los Angeles
4. Department of Pediatric Surgery, Naval Medical Center Portsmouth, Portsmouth, Virginia
5. Division of Pediatric Surgery, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
6. Department of Surgery, University of Michigan Medical School, Ann Arbor
7. Department of Pediatric Surgery, University of Michigan, Ann Arbor
8. Division of Pediatric Surgery, Hasbro Children's Hospital, Providence, Rhode Island
9. Department of Surgery, Alpert Medical School, Brown University, Providence, Rhode Island
10. Department of Pediatric Anesthesiology, Warren Alpert Medical School, Brown University, Providence, Rhode Island
11. Department of Pediatric Surgery, Nationwide Children's Hospital, The Ohio State University, Columbus
12. Department of Surgery, University of Arizona College of Medicine, Tucson
13. Division of Pediatric Surgery, University of Miami Miller School of Medicine, Miami, Florida
14. Division of Pediatric General and Thoracic Surgery, Seattle Children’s Hospital, Seattle, Washington
15. Department of Surgery, University of Washington School of Medicine, Seattle
16. Department of Surgery, Children's Mercy Hospital, Kansas City, Missouri
17. Division of Pediatric Surgery, Hiram C. Polk Jr MD Department of Surgery, University of Louisville, Louisville, Kentucky
18. Division of Pediatric Surgery, Department of Surgery, Oregon Health & Science University, Portland
19. Division of Library Services, Naval Medical Center, Portsmouth, Virginia
20. Division of Pain Medicine, Department of Anesthesiology and Critical Care Medicine, Children’s Hospital Los Angeles, Los Angeles, California