1. Boston University School of Medicine (M.F.H.), Boston, Massachusetts 02118-2526
2. Osteoporosis Research Program (N.C.B.), University of Wisconsin, Madison, Wisconsin 53706
3. Department of Rheumatology and Institute for Physical Medicine (H.A.B.-F.), University Hospital Zurich, 8091 Zurich, Switzerland
4. Divisions of Adolescent Medicine and Endocrinology (C.M.G.), Childrens Hospital, Boston, Massachusetts 02115
5. Division of Endocrinology and Metabolism (D.A.H.), Calgary, Canada AB T2N 4N1
6. Health Science Centre, University of Calgary Faculty of Medicine (R.P.H.), Calgary, Canada AB T2N 4N1
7. Creighton University (R.P.H.), Omaha, Nebraska 68131
8. Division of Preventative, Occupational, and Aerospace Medicine Mayo Clinic (M.H.M.), Rochester, Minnesota 55905
9. Department of Foods and Nutrition (C.M.W.), Purdue University, West Lafayette, Indiana 47907