1. Department of Tissue Growth and Repair (J.L.D., A.J.C.) Genetics Institute, Inc. Cambridge, Massachusetts 02140
2. Departments of Pathology (P.W., J.E., M.M.M.), Texas 77030
3. Molecular and Human Genetics (J.E., M.M.M.) Baylor College of Medicine Houston, Texas 77030
4. Departments of Orthopaedic Surgery and Biological Chemistry (K.M.L.) University of California Los Angeles School of Medicine Los Angeles, California 90095
5. Cell Biology (M.M.M.), Texas 77030