@misc{indiciae375bdae6fb9b,
  title = {Caffeine and methylxanthines.},
  author = {D Raybin},
  year = {1990},
  doi = {10.1378/chest.97.5.1273b},
  url = {https://pubmed.ncbi.nlm.nih.gov/2331940/},
  note = {Source identifier: 2331940}
}