@misc{indiciae6cd074a81353,
  title = {Fecal occult blood testing. Problems, pitfalls, and diagnostic concerns.},
  author = {D A Johnson},
  year = {1989},
  doi = {10.1080/00325481.1989.11700673},
  url = {https://pubmed.ncbi.nlm.nih.gov/2648374/},
  note = {Source identifier: 2648374}
}