1. University of Houston College of Optometry; Fort Worth Texas USA
2. New England College of Optometry; Boston Massachusetts USA
3. Marshall B. Ketchum University, Southern California College of Optometry; Fullerton California USA
4. Chicago College of Optometry; Midwestern University; Downers Grove Illinois USA
5. White River Junction VA Medical Center; Hartford Vermont USA
6. Centre for Applied Vision Research, School of Health Sciences; City, University of London; London UK