@misc{indiciae3bf967156bf4,
  title = {Multi-centre trials in pain research.},
  author = {P J McGrath},
  year = {1991},
  doi = {10.1097/00002508-199112000-00002},
  url = {https://pubmed.ncbi.nlm.nih.gov/1809438/},
  note = {Source identifier: 1809438}
}