The Effects of Erythrina subumbrans (Hassk.) Merr. Leaves Extract on Nicotine Withdrawal Syndrome and β2 nAChRs Expression in The Ventral Tegmental Area of RatsNurvita Risdiana, Rina Susilowati, Eti Nurwening Sholikhah and Ginus PartadiredjaBIO Web Conf., 49 (2022) 01002DOI: https://doi.org/10.1051/bioconf/20224901002