[1] Univ Iowa, Howard Hughes Med Inst, Iowa City, IA 52242 USA
[2] Univ Iowa, Dept Pediat, Iowa City, IA 52242 USA
[3] NHGRI, Genet Dis Res Branch, NIH, Bethesda, MD 20892 USA
[4] Univ Iowa, Dept Ophthalmol, Iowa City, IA 52242 USA
[5] Harbor UCLA Med Ctr, Dept Ophthalmol, Torrance, CA 90509 USA
[6] Mem Univ St Johns, Fac Med, St Johns, NF, Canada
[7] Univ Toronto, Dept Ophthalmol, Toronto, ON M5S 1A1, Canada
[8] Univ Toronto, Vis Sci Res Program, Toronto, ON M5S 1A1, Canada
[9] Long Isl Coll Hosp, Brooklyn, NY 11201 USA