1. Abrahamson Pediatric Eye Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
2. Department of Ophthalmology, University of Cincinnati College of Medicine, Cincinnati, Ohio
3. Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City
4. University of Iowa Institute for Vision Research, Iowa City
5. Private practice, Nashville, Tennessee
6. Department of Biostatistics, University of Iowa, Iowa City