@misc{indiciae0aaf9d8504fa, title = {Opioid Peptides: introduction.}, author = {J Hughes and H W Kosterlitz}, year = {1983}, doi = {10.1093/oxfordjournals.bmb.a071781}, url = {https://pubmed.ncbi.nlm.nih.gov/6301604/}, note = {Source identifier: 6301604} }