@misc{indiciae8e8923c9c946,
  title = {Deficit or negative syndrome?},
  author = {S R Kay and L A Opler},
  year = {1989},
  doi = {10.1176/ajp.146.2.282},
  url = {https://pubmed.ncbi.nlm.nih.gov/2912280/},
  note = {Source identifier: 2912280}
}