TY - RPRT TI - The Effects of Strain and Estrous Cycle on Heroin- and Sucrose-Maintained Responding in Female Rats AU - Schmidt, K. T. AU - Sharp, J. L. AU - Ethridge, S. B. AU - Pearson, T. AU - Ballard, S. AU - Potter, K. M. AU - Smith, M. A. PY - 2020 DO - 10.1101/2020.11.06.370023 UR - https://www.biorxiv.org/content/10.1101/2020.11.06.370023v1 ID - 10.1101/2020.11.06.370023 ER -