@misc{indiciae9df5637379fc,
  title = {Ectopic pregnancy.},
  author = {S A Carson and J E Buster},
  year = {1993},
  doi = {10.1056/nejm199310143291608},
  url = {https://pubmed.ncbi.nlm.nih.gov/8377783/},
  note = {Source identifier: 8377783}
}