If the inline PDF is not rendering correctly, you can download the PDF file here.
T.M. Owings, MJ. Pavol, P.C. Grabiner, and M.D. Grabiner are with the Department of Biomedical Engineering at the Cleveland Clinic Foundation, 9500 Euclid Ave., Cleveland, OH 44106. K.T. Foley is with the Section of Geriatric Medicine at the Cleveland Clinic Foundation.