@misc{indiciae86aa01af0a7a,
  title = {Frequent-user subgroups.},
  author = {E S Casper and J R Regan},
  year = {1992},
  doi = {10.1176/ps.43.1.83},
  url = {https://pubmed.ncbi.nlm.nih.gov/1622468/},
  note = {Source identifier: 1622468}
}