1. From the Human Genetics Center, The University of Texas Health Science Center, Houston, Texas;
2. the Genome Sequencing Center, Washington University, St. Louis, Missouri;
3. the Retina Foundation of the Southwest, Dallas, Texas;
4. the Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan; and
5. the F. M. Kirby Center for Molecular Ophthalmology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.