@misc{indiciae50b14206a16c,
  title = {Contraceptive implants.},
  author = {H B Croxatto and S Díaz and I Sivin},
  year = {1991},
  doi = {10.1111/j.1749-6632.1991.tb37896.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1905507/},
  note = {Source identifier: 1905507}
}