1. University of California-Los Angeles (UCLA)-Orthopaedic Hospital Research Center and Department of Orthopaedic Surgery (J.S.A., M.H.), UCLA, Los Angeles, California 90095-7358
2. Department of Molecular, Cell, and Developmental Biology (J.S.A.), UCLA, Los Angeles, California 90095-7358
3. Department of Medicine (J.S.A., M.H.), UCLA, Los Angeles, California 90095-7358
4. Molecular Biology Institute (M.H.), UCLA, Los Angeles, California 90095-7358