Knee injury is an indicator for protective effects of bisphosphonates on knee osteoarthritis radiographic and clinical outcomes, a longitudinal propensity score-matched study from the osteoarthritis initiative. Issue 1 (April 2020) - Haj-Mirzaian, A.; Guermazi, A.; Cao, X.; Bingham, C.; Roemer, F.; Wan, M.; Zhen, G.; Demehri, S.