@misc{indiciae60fa7b3bae25,
  title = {Updated Kiel classification.},
  author = {G Mead and J Sweetenham},
  year = {1988},
  doi = {10.1016/s0140-6736(88)91449-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/2894580/},
  note = {Source identifier: 2894580}
}