@misc{indiciae30be70b735e8,
  title = {Selective migration by birthweight.},
  author = {J Elford and P Whincup and A G Shaper},
  year = {1993},
  doi = {10.1136/jech.47.4.336},
  url = {https://pubmed.ncbi.nlm.nih.gov/8228776/},
  note = {Source identifier: 8228776}
}