Sörensen, Jens, et al. “Long-Standing Increased Bone Turnover at the Fixation Points After Anterior Cruciate Ligament Reconstruction: A Positron Emission Tomography (PET) Study of 8 Patients”. Acta Orthopaedica, vol. 77, no. 6, Jan. 2006, pp. 921-5, doi:10.1080/17453670610013231.