1. College of Optometry; The Ohio State University; Columbus Ohio USA
2. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht Netherlands
3. Johns Hopkins University; Baltimore Maryland USA
4. Southern California College of Optometry; Fullerton California USA
5. Department of Ophthalmology, School of Medicine; University of Colorado; Aurora CO USA
6. Department of Ophthalmology; University of Arizona; Tucson Arizona USA