1. Department of Ophthalmology, Northwestern University, Chicago, Illinois
2. Department of Ophthalmology, Cole Eye Institute, Cleveland, Ohio
3. Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland, Ohio
4. Department of Ophthalmology, Bascom Palmer Eye Institute, Miami, Florida
5. Department of Ophthalmology, Stanley M. Truhlsen Eye Institute, Omaha, Nebraska