@misc{indiciaee1a31fb7c14d,
  title = {Ectopic pregnancy: duplex Doppler evaluation.},
  author = {K J Taylor and I M Ramos and A L Feyock and D P Snower and D Carter and B S Shapiro and W R Meyer and A H De Cherney},
  year = {1989},
  doi = {10.1148/radiology.173.1.2675192},
  url = {https://pubmed.ncbi.nlm.nih.gov/2675192/},
  note = {Source identifier: 2675192}
}