@misc{indiciae1b9ccbed56a8,
  title = {Occult blood tests.},
  author = {R Gnauck},
  year = {1980},
  doi = {10.1016/s0140-6736(80)91315-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6102700/},
  note = {Source identifier: 6102700}
}