1. J. D. Eudy, S. F. Yao, M. Ma-Edmonds, J. J. Cheng, C. B. Talmadge, J. Sumegi, Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA.
2. M. D. Weston, D. M. Hoover, K. W. Beisel, W. J. Kimberling, Department of Genetics, Boystown National Research Hospital, Omaha, NE 68131, USA.
3. H. L. Rehm, Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
4. D. Yan and A. Swaroop, Department of Ophthalmology, W. K. Kellogg Eye Center, University of Michigan, Ann Arbor, MI 48105, USA.
5. I. Ahmad, Department of Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA.