@misc{indiciae00008819a91e,
  title = {Heaf grade I.},
  author = {C J Stewart},
  year = {1972},
  doi = {10.1016/s0140-6736(72)90489-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4125188/},
  note = {Source identifier: 4125188}
}