1. Oregon Osteoporosis Center (M.R.M.), Portland, Oregon 97213;
2. Radiant Research-Honolulu (R.D.W.), Honolulu, Hawaii 96814;
3. Nottingham City Hospital (D.J.H.), Nottingham, NG5 1PB, United Kingdom;
4. Center for Clinical and Basic Research (C.C., P.R.), Ballerup DK-2750, Denmark;
5. Merck Research Laboratories (M.W., A.M.M, J.Y., P.D.R., A.C.S), Rahway, New Jersey 07065