Robertsson, Otto, Jonas Ranstam, and Lars Lidgren. “Variation in Outcome and Ranking of Hospitals: An Analysis from the Swedish Knee Arthroplasty Register”. Acta Orthopaedica 77, no. 3 (January 1, 2006): 487–493. Accessed May 1, 2026. https://actaorthop.org/actao/article/view/19206.