Cerebrospinal Fluid Biomarkers in Opioid Dependence: Evidence of Neuroimmune Activation and Ion Composition Changes, Without Alteration in Orexin‐A. - Lyckenvik, Tim; Woock, Malin; Johansson, Kalle; Axelsson, Markus; Zetterberg, Henrik; Blennow, Kaj; Hanse, Eric; Wasling, Pontus (Addiction Biology, 2025)