C??? l??v?? h?v? been used ?? a ?t?mul?nt b? ??m? ?nd?g?n?u? persons ?file South Am?r??? ??n?? h??t?r???l t?m??.Th?? fl??d ?f d???m?n? in th? brain’s r?w?rd ??r?u?t strongly reinforces drug-getting behaviors, simply because th? r?w?rd ??r?u?t ?v?ntu?ll? ?d??t? t? the ?x???? of d???m?n? brought on b? ?????n?, and b???m?? considerably less sensitiv