Kumm, Jaanika, et al. “Structural Abnormalities Detected by Knee Magnetic Resonance Imaging Are Common in Middle-Aged Subjects With and Without Risk Factors for Osteoarthritis”. Acta Orthopaedica, vol. 89, no. 5, Sept. 2018, pp. 535-40, doi:10.1080/17453674.2018.1495164.