1. Michigan Bone and Mineral Clinic (H.G.B.), Detroit, Michigan 48236
2. The Bethesda Health Research Center (M.A.B.), Bethesda, Maryland 20817-1106
3. University of Manitoba (C.K.Y.), Winnipeg, Manitoba, Canada R3T 2N2
4. University of British Columbia (D.L.K.), Vancouver, British Columbia, Canada V6T 1Z4
5. University of Amgen Inc. (H.W., Y.L., J.S.M.), Thousand Oaks, California 91320-1799