[1] Univ Iowa, Coll Med, Iowa City, IA USA
[2] Univ Utah, Moran Eye Ctr, Ophth & Visual Sci, Salt Lake City, UT USA
[3] Univ Iowa Hosp & Clin, Ophth & Visual Sci, Iowa City, IA 52242 USA
[4] Wolfe Eye Clin, W Des Moines, IA USA
[5] Wolfe Eye Clin, Cedar Rapids, IA USA
[6] Retina & Vitreous Consultants, St Louis, MO USA
[7] Ctr Retina & Macular Dis, Winter Haven, FL USA