1. Ophthalmology Department, Charlie Norwood VA Medical Center, 1 Freedom Way, Augusta, GA 30904, USA
2. Ophthalmology Department, Georgia Health Sciences University, 1120 15th Street, Augusta, GA 30912, USA
3. Pathology and Laboratory Medicine Department, Charlie Norwood VA Medical Center, 1 Freedom Way, Augusta, GA 30904, USA
4. Ophthalmology Department, Eye Physicians and Surgeons of Hattiesburg, 415 South 28th Avenue, Hattiesburg, MS 39401, USA