Are risk factors for patellofemoral and tibiofemoral knee osteoarthritis different?
McAlindon T, Zhang Y, Hannan M, Naimark A, Weissman B, Castelli W, Felson D. Are risk factors for patellofemoral and tibiofemoral knee osteoarthritis different? J Rheumatol. 1996 Feb; 23(2):332-7.