TY - RPRT TI - Impact of opioid-based versus opioid-free anaesthesia on postoperative recovery, circulating inflammatory cytokines and brain-derived neurotrophic factor. AU - Gricourt, Y. AU - Lin, K. AU - Althoff, T. AU - Nguyen, E. AU - Mattern, A. AU - Nair, M. AU - Leong, T. AU - Silva, E. AU - Grogan, T. R. AU - Massaly, N. PY - 2026 DO - 10.64898/2026.09.25.754530 UR - https://www.biorxiv.org/content/10.64898/2026.09.25.754530v1 ID - 10.64898/2026.09.25.754530 ER -