1. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology and Biomedical Imaging; University of California-San Francisco; 185 Berry Street, Lobby 6, Suite 350 San Francisco California 94107
2. Department of Physical Therapy and Rehabilitation Science; University of California-San Francisco; California
3. Department of Orthopaedic Surgery; University of California-San Francisco; California