@misc{indiciae4753dc519304,
  title = {Choosing between randomised and non-randomised studies: a systematic review.},
  author = {A Britton and M McKee and N Black and K McPherson and C Sanderson and C Bain},
  year = {1998},
  url = {https://pubmed.ncbi.nlm.nih.gov/9793791/},
  note = {Source identifier: 9793791}
}