TY - RPRT TI - Xylazine Reshapes the Sleep and Respiratory Consequences of Chronic Fentanyl Exposure in a Sex-Dependent Manner AU - Gamble, M. C. AU - Vilca, S. J. AU - Williams, B. AU - Guindon, G. AU - Dang, V. AU - Logan, R. W. PY - 2026 DO - 10.64898/2026.09.02.748951 UR - https://www.biorxiv.org/content/10.64898/2026.09.02.748951v1 ID - 10.64898/2026.09.02.748951 ER -