1. Department of Chemistry, University of Southern California, Los Angeles, California 90089-0744; Procter & Gamble Pharmaceuticals, Mason, Ohio 45040; Bone Research Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, United Kingdom; Nuffield Department of Orthopaedic Surgery, Oxford University, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Center, Headington, Oxford OX3 7LD, United Kingdom; and Cell and Molecular Biology, Division of Biomedical Sciences, Imperial...