Directional fractal signature analysis of trabecular bone and its relation to incident radiographic knee osteoarthritis: 30, 60 and 84-month follow-up data from the most cohort. (April 2015) - Podsiadlo, P.; Nevitt, M.; Wolski, M.; Stachowiak, G.W.; Lynch, J.; Tolstykh, I.; Felson, D.T.; Segal, N.A.; Lewis, C.E.; Englund, M.