Lindh, Christer, Madeleine Thörnwall, Ann-Cathrin Hansen, Claes Post, Torsten Gordh, Gunnar Ordeberg, and Fred Nyberg. “Neuropeptide-Converting Enzymes in Cerebrospinal fluid:Activities Increased in Pain from Herniated Lumbar Disc, But Not from Coxarthrosis”. Acta Orthopaedica 67, no. 2 (January 1, 1996): 189–192. Accessed May 14, 2026. https://actaorthop.org/actao/article/view/20999.