1. Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
2. Center for Health Information Partnerships, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
3. Morsani College of Medicine, Department of Ophthalmology, University of South Florida, Tampa, Florida, USA
4. Division of Ophthalmology, Alpert Medical School, Brown University, Providence, Rhode Island, USA
5. Section of Ophthalmology, Providence VA Medical Center, Providence, Rhode Island, USA
6. Department of Ophthalmology and Center for Health Services and Outcomes Research, Northwestern University, Chicago, Illinois, USA
7. Department of Veterans Affairs, Health Services Research and Development Service, Chicago, Illinois, USA