@misc{indiciaeb79d2391b2f5,
  title = {Heaf grade 1.},
  author = {T P Eddy},
  year = {1972},
  doi = {10.1016/s0140-6736(72)92868-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4109760/},
  note = {Source identifier: 4109760}
}