@misc{indiciae09970538db46,
  title = {Intestinal antibodies.},
  author = {W A Walker and K J Isselbacher},
  year = {1977},
  doi = {10.1056/nejm197710062971407},
  url = {https://pubmed.ncbi.nlm.nih.gov/408686/},
  note = {Source identifier: 408686}
}