@misc{indiciae98f263f93e38,
  title = {Multiple births: too often a disaster.},
  author = {D M Campbell},
  year = {1991},
  doi = {10.1136/bmj.302.6779.740},
  url = {https://pubmed.ncbi.nlm.nih.gov/2021761/},
  note = {Source identifier: 2021761}
}