@misc{indiciae333e6d51101c,
  title = {Data bases for variations research.},
  author = {J E Paul and K A Weis and R A Epstein},
  year = {1993},
  doi = {10.1097/00005650-199305001-00016},
  url = {https://pubmed.ncbi.nlm.nih.gov/8492595/},
  note = {Source identifier: 8492595}
}