@misc{indiciae4530be90c320,
  title = {Risk factors for ectopic pregnancy: a meta-analysis.},
  author = {W M Ankum and B W Mol and F Van der Veen and P M Bossuyt},
  year = {1996},
  url = {https://pubmed.ncbi.nlm.nih.gov/8641479/},
  note = {Source identifier: 8641479}
}