TY - RPRT TI - Individual vulnerability to stress is associated with increased demand for intravenous heroin self-administration in rats AU - Stafford, N. P. AU - Kazan, T. N. AU - Donovan, C. M. AU - Hart, E. E. AU - Drugan, R. C. AU - Charntikov, S. PY - 2019 DO - 10.1101/627471 UR - https://www.biorxiv.org/content/10.1101/627471v1 ID - 10.1101/627471 ER -