1. Scheie Eye Institute, Department of Ophthalmology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
2. Center for Pharmacoepidemiology Research and Training, University of Pennsylvania, Philadelphia, Pennsylvania, USA
3. Leonard Davis Institute, University of Pennsylvania, Philadelphia, Pennsylvania, USA
4. Center for Preventative Ophthalmology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania, USA
5. The Emmes Company, LLC, Rockville, Illinois, USA
6. Department of Ophthalmology and Visual Science, University of Wisconsin-Madison, Madison, Wisconsin, USA
7. Doheny Eye Institute, University of California, Los Angeles, California, USA
8. Department of Ophthalmology, Penn State College of Medicine, Hershey, Pennsylvania, USA
9. Department of Public Health Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA