@misc{indiciaea26c337c0b78,
  title = {Twin zygosity and pre-eclampsia.},
  author = {D M Campbell and I MacGillivray and B Thompson},
  year = {1977},
  doi = {10.1016/s0140-6736(77)90109-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/69187/},
  note = {Source identifier: 69187}
}