@misc{indiciae79360cbeddaa,
  title = {Vitamin B12.},
  author = {M Marcus},
  year = {1981},
  doi = {10.1093/ajcn/34.8.1622},
  url = {https://pubmed.ncbi.nlm.nih.gov/7270487/},
  note = {Source identifier: 7270487}
}