1. Division of Medical Genetics (D.A.S., J.C.C., J.L.B.B.), Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, Utah 84132
2. Shriners Hospital for Children Intermountain (D.A.S., J.C.C.), Salt Lake City, Utah 84103
3. Department of Chemistry (S.P.C., K.L.E.), Indiana University-Purdue University, Fort Wayne, Indiana 46805-1499
4. Department of Pediatrics, and Division of Maternal-Fetal Medicine (J.L.B.B.), Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, Utah 84132
5. Division of Bone and Mineral Diseases (S.M., M.P.W.), Washington University School of Medicine, St. Louis, Missouri 63110
6. Center for Metabolic Bone Disease and Molecular Research (S.M., M.P.W.), Shriners Hospitals for Children, St. Louis, Missouri 63131