1. Stamford Health Stamford Connecticut USA
2. Department of Molecular Physiology and Biophysics University of Iowa Iowa City, Iowa USA
3. Center for the Prevention and Treatment of Visual Loss Veterans Administration Health Center Iowa City, Iowa USA
4. Department of Neurology Leiden University Medical Center Leiden Netherlands
5. Child & Adolescent Headache Program University of California San Francisco, California USA
6. Division of Behavioral Medicine and Clinical Psychology Cincinnati Children's Hospital Cincinnati Ohio USA
7. Center for Understanding Pediatric Pain Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
8. Department of Pediatrics University of Cincinnati College of Medicine Cincinnati Ohio USA
9. Department of Psychiatry University of Illinois at Chicago Chicago Illinois USA
10. Department of Anesthesiology Washington University Pain Center, Washington University School of Medicine St. Louis Missouri USA