@misc{indiciae61616ad2cabf,
  title = {Methylxanthines.},
  author = {P Goldenheim},
  year = {1990},
  doi = {10.7326/0003-4819-112-1-74\_1},
  url = {https://pubmed.ncbi.nlm.nih.gov/2293821/},
  note = {Source identifier: 2293821}
}