Mattila, V. M., R. Sihvonen, J. Paloneva, and L. Felländer-Tsai. “Changes in Rates of Arthroscopy Due to Degenerative Knee Disease and Traumatic Meniscal Tears in Finland and Sweden”. Acta Orthopaedica, vol. 87, no. 1, Jan. 2016, pp. 5-11, doi:10.3109/17453674.2015.1066209.