1. From the Department of Ophthalmology and Visual Sciences, University of Iowa Hospitals and Clinics, Iowa City, Iowa; the2Department of Veterans Affairs, Iowa City VA Medical Center, Iowa City, Iowa; the
2. From the Department of Ophthalmology and Visual Sciences, University of Iowa Hospitals and Clinics, Iowa City, Iowa; the
3. Department of Neurosurgery, SUNY Health Sciences Center, Syracuse, New York;
4. Visionquest Biomedical Inc., Albuquerque, New Mexico; the
5. Department of Biostatistics, College of Public Health, University of Iowa, Iowa City, Iowa; and the
6. Department of Ophthalmology and Visual Science, University of Chicago, Chicago, Illinois.