@misc{indiciaedbd5d87033a7,
  title = {Effectiveness and risks of birth-control methods.},
  author = {D M Potts and G I Swyer},
  year = {1970},
  doi = {10.1093/oxfordjournals.bmb.a070738},
  url = {https://pubmed.ncbi.nlm.nih.gov/4904683/},
  note = {Source identifier: 4904683}
}