Niinimäki, Tuukka, Risto Ojala, Jaakko Niinimäki, and Juhana Leppilahti. “The Standing Fixed Flexion View Detects Narrowing of the Joint Space Better Than the Standing Extended View in Patients With Moderate Osteoarthritis of the Knee”. Acta Orthopaedica 81, no. 3 (June 1, 2010): 344–346. Accessed April 28, 2024. https://actaorthop.org/actao/article/view/11064.