@misc{indiciae9aa84d793ff5,
  title = {Reduced risk with gas analysis.},
  author = {J M Calkins},
  year = {1986},
  doi = {10.1007/bf01637672},
  url = {https://pubmed.ncbi.nlm.nih.gov/3711950/},
  note = {Source identifier: 3711950}
}