%0 Journal Article %T Long-term interactions between opioid and cannabinoid agonists at the cellular level: cross-desensitization and downregulation %A Shapira, Ma’anit %A Gafni, Mikhal %A Sarne, Yosef %J Brain Research $V 960 %N 1 %P 190-200 %@ 0006-8993 %D 2003 %I Elsevier