@misc{indiciae020be23caa7f,
  title = {Longevity--does family size matter?},
  author = {T Ligtenberg and H Brand},
  year = {1999},
  doi = {10.1038/21059},
  url = {https://pubmed.ncbi.nlm.nih.gov/10376589/},
  note = {Source identifier: 10376589}
}