@misc{indiciaecf180f42c85a,
  title = {Lentigo and electrocardiographic changes.},
  author = {N L Matthews},
  year = {1968},
  doi = {10.1056/nejm196804042781410},
  url = {https://pubmed.ncbi.nlm.nih.gov/5638719/},
  note = {Source identifier: 5638719}
}