@misc{indiciaeaad8b9c89b07,
  title = {Twinning.},
  author = {D R Mattison},
  year = {1972},
  doi = {10.1056/nejm197203022860916},
  url = {https://pubmed.ncbi.nlm.nih.gov/5061903/},
  note = {Source identifier: 5061903}
}