TY - RPRT TI - Escalation of intravenous fentanyl self-administration and assessment of withdrawal behavior in male and female mice AU - Chen, Y. AU - Xiao, T. AU - Kimbrough, A. PY - 2024 DO - 10.1101/2024.04.03.587958 UR - https://www.biorxiv.org/content/10.1101/2024.04.03.587958v1 ID - 10.1101/2024.04.03.587958 ER -