1. Department of Ophthalmology, Portland VA Health Care System, Portland, OR, USA
2. Departments of Ophthalmology (Casey Eye Institute), Oregon Health & Science University, Portland, OR, USA
3. Department of Ophthalmology, Medical College of Wisconsin, Milwaukee, WI, USA
4. Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
5. Hospital and Specialty Medicine, Oregon Health & Science University, Portland, OR, USA
6. John A. Moran Eye Center, University of Utah, Salt Lake City, UT, USA