@misc{indiciae9e085765f561,
  title = {Controlled trials in single subjects.},
  author = {S Day},
  year = {1991},
  doi = {10.1136/bmj.303.6801.522-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/1912870/},
  note = {Source identifier: 1912870}
}