@misc{indiciae16105f14efa4,
  title = {Unexpected control-group behaviour in an intervention study.},
  author = {S Anttila and M Isokoski},
  year = {1985},
  doi = {10.1016/s0140-6736(85)90985-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2856961/},
  note = {Source identifier: 2856961}
}