@misc{indiciae96c510d1cdeb,
  title = {Measuring contraceptive effectiveness: a conceptual framework.},
  author = {J B Stanford},
  year = {1997},
  doi = {10.1016/s0029-7844(97)84261-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/8990461/},
  note = {Source identifier: 8990461}
}