Strömqvist, Björn, Bo Jönsson, Peter Fritzell, Olle Hägg, Bengt-Erik Larsson, and Bengt Lind. “The Swedish National Register for Lumbar Spine Surgery: Swedish Society for Spinal Surgery”. Acta Orthopaedica 72, no. 2 (January 1, 2001): 99–106. Accessed May 12, 2026. https://actaorthop.org/actao/article/view/20029.