@misc{indiciaebf8cdcb1fba2,
  title = {The Progestasert and ectopic pregnancy.},
  author = {R Snowden},
  year = {1977},
  doi = {10.1136/bmj.2.6102.1600-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/589359/},
  note = {Source identifier: 589359}
}