1. Department of Molecular Biology and Genetics (S.-J.L., Y.-S.L.), Baltimore, Maryland 21205
2. Departments of Surgery and Cell Biology and Anatomy (T.A.Z.), University of Miami Miller School of Medicine, Miami, Florida 33136
3. Departments of Pediatrics and Neurology (A.S., R.D.C.), McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
4. Departments of Pathology and Immunology (M.M.M.), Molecular and Human Genetics, and Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030
5. Division for Therapies against Intractable Diseases (K.T.), Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Aichi 470-1192, Japan
6. Department of Anatomy and Cell Biology (E.R.B.), University of Pennsylvania School of Dental Medicine, Philadelphia, Pennsylvania 19104