Ponkilainen, Ville T, Tuomas T Huttunen, Marko H Neva, Liisa Pekkanen, Jussi P Repo, and Ville M Mattila. 2020. “National Trends in Lumbar Spine Decompression and Fusion Surgery in Finland, 1997–2018”. Acta Orthopaedica 92 (2):199-203. https://doi.org/10.1080/17453674.2020.1839244.