Cámara Arrigunaga, F.E. et al. 2020. Correlation of the Kellgren-Lawrence Scale with the Outerbridge Classification in Patients with Chronic Gonalgia. Revista Colombiana de Ortopedia y Traumatología. 34, 2 (Jul. 2020), 160–166. DOI:https://doi.org/10.1016/j.rccot.2020.06.012.