Akamatsu, Yasushi, Naoto Mitsugi, Takeshi Hayashi, Hideo Kobayashi, and Tomoyuki Saito. “Low Bone Mineral Density Is Associated With the Onset of Spontaneous Osteonecrosis of the Knee”. Acta Orthopaedica 83, no. 3 (June 1, 2012): 249–255. Accessed May 11, 2026. https://actaorthop.org/actao/article/view/10798.