TY - RPRT TI - Fentanyl reinstatement to discriminative cues after conflict in sign- and goal-tracking rats AU - Martin, D. A. AU - Keefer, S. E. AU - Calu, D. J. PY - 2022 DO - 10.1101/2022.02.10.479913 UR - https://www.biorxiv.org/content/10.1101/2022.02.10.479913v1 ID - 10.1101/2022.02.10.479913 ER -