@misc{indiciaee956191fab86,
  title = {How many endoscopic biopsy specimens?},
  author = {R Rowland and T Durbridge},
  year = {1976},
  doi = {10.5694/j.1326-5377.1976.tb134452.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/979835/},
  note = {Source identifier: 979835}
}