1. Scheie Eye Institute, Department of Ophthalmology, University of Pennsylvania Perelman School of Medicine, Philadelphia2Center for Clinical Epidemiology and Biostatistics, Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman S
2. currently a medical student at Lake Erie College of Osteopathic Medicine, Bradenton, Florida
3. Leonard Davis Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia