Irmola, T. et al. 2020. Association between fixation type and revision risk in total knee arthroplasty patients aged 65 years and older: a cohort study of 265,877 patients from the Nordic Arthroplasty Register Association 2000–2016. Acta Orthopaedica. 92, 1 (Nov. 2020), 90–95. DOI:https://doi.org/10.1080/17453674.2020.1837422.