1Bone and Mineral Research Laboratory, Department of Medicine, Henry Ford Hospital, Detroit, MI
2Bone and Mineral Metabolism Section, Division of Metabolism, Endocrinology and Genetics, Department of Medicine, Duke University Medical Center, Durham, NC
3Genetics Unit, Shriners Hospital for Crippled Children, Montreal, Quebec, Canada
4Departnient of Human Metabolism and Clinical Biochemistry, University of Sheffield, Sheffield. UK
5Department of Medicine, Division of Nephrology, Bone and Mineral Metabolism, University of Kentucky College of Medicine, Lexington, KT
6INSERM Unit 234, Faculte Alexis Carrel, Lyon, France
7Department of Medicine, Harborview Medical Center, University of Washington, Seattle, WA
8Metabolic Research Unit, Department of Internal Medicine, Creighton University School of Medicine, Omaha, NB