@misc{indiciae5641020146c6,
  title = {The controlled single subject trial.},
  author = {T Johannessen and H Petersen and P Kristensen and D Fosstvedt},
  year = {1991},
  doi = {10.3109/02813439109026576},
  url = {https://pubmed.ncbi.nlm.nih.gov/1675018/},
  note = {Source identifier: 1675018}
}