@misc{indiciae999c02924531,
  title = {Conditioning in human opiate addicts.},
  author = {C P O'Brien and T Testa and T J O'Brien and R Greenstein},
  doi = {10.1007/bf03000314},
  url = {https://pubmed.ncbi.nlm.nih.gov/995439/},
  note = {Source identifier: 995439}
}