TY - RPRT TI - Sign-tracking behavior is difficult to extinguish and resistant to multiple cognitive enhancers AU - Fitzpatrick, C. J. AU - Geary, T. AU - Creeden, J. F. AU - Morrow, J. D. PY - 2019 DO - 10.1101/581769 UR - https://www.biorxiv.org/content/10.1101/581769v1 ID - 10.1101/581769 ER -