@misc{indiciaeb5609eca1d8f, title = {Decrease in delta-opioid receptor density in rat brain after chronic [D-Ala2,D-Leu5]enkephalin treatment.}, author = {P L Tao and L R Chang and P Y Law and H H Loh}, year = {1988}, doi = {10.1016/0006-8993(88)90559-8}, url = {https://pubmed.ncbi.nlm.nih.gov/2847851/}, note = {Source identifier: 2847851} }