@misc{indiciaeb0792a815cd3,
  title = {Diabetic retinopathy study.},
  year = {1973},
  doi = {10.1016/0002-9394(73)90508-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4728568/},
  note = {Source identifier: 4728568}
}