@misc{indiciaefbe3fb915129,
  title = {Evaluation of a serum optical density method for excluding malabsorption.},
  author = {J B GABRIEL and E VORSANGER and D T BEER and M SASS},
  year = {1963},
  doi = {10.1093/ajcp/39.5.456},
  url = {https://pubmed.ncbi.nlm.nih.gov/13963199/},
  note = {Source identifier: 13963199}
}