Irmola, T., Ponkilainen, V., Mäkelä, K. T., Robertsson, O., W-Dahl, A., Furnes, O., Fenstad, A. M., Pedersen, A. B., Schrøder, H. M., Niemeläinen, M. J., & Eskelinen, A. (2022). Impact of Nordic Arthroplasty Register Association (NARA) collaboration on demographics, methods and revision rates in knee arthroplasty: a register-based study from NARA 2000–2017. Acta Orthopaedica, 93, 866–873. https://doi.org/10.2340/17453674.2022.5256