@misc{indiciaedc7af58a02e8,
  title = {Theophylline concentrations and posture.},
  author = {J Warren},
  year = {1983},
  doi = {10.1016/s0140-6736(83)90764-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6137672/},
  note = {Source identifier: 6137672}
}