[1] Merck Frosst Canada & Co, Med Chem, Kirkland, PQ H9H 3L1, Canada
[2] Merck Frosst Canada & Co, Biochem, Kirkland, PQ, Canada
[3] Merck Res Labs, Dept Bone Biol & Osteoporosis Res, W Point, PA 19486 USA
[4] Axys Pharmaceut Inc, S San Francisco, CA 94080 USA