1. Department of Clinical Research Services Nationwide Children's Hospital Columbus Ohio USA
2. School of Medicine The Ohio State University College of Medicine Columbus Ohio USA
3. Department of Anesthesiology, Perioperative and Pain Medicine Stanford University School of Medicine Palo Alto California USA
4. Department of Pediatrics University of Cincinnati College of Medicine Cincinnati Ohio USA
5. Division of Biostatistics and Epidemiology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
6. Pediatric Pain Research Center, Division of Behavioral Medicine and Clinical Psychology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
7. Department of Anesthesiology and Perioperative Medicine Nemours Children's Health Wilmington Delaware USA