@misc{indiciaefe080d246a52,
  title = {Differences in placebo effects.},
  author = {W L Isaac and W Isaac},
  year = {1977},
  doi = {10.1016/0091-3057(77)90079-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/859897/},
  note = {Source identifier: 859897}
}