@misc{indiciaeb33ebca997f2,
  title = {Classically conditioned phenomena in human opiate addiction.},
  author = {C P O'Brien and J W Ternes and J Grabowski and R Ehrman},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/6798452/},
  note = {Source identifier: 6798452}
}