@misc{indiciae98643a09e15b,
  title = {Methylxanthines in 1989.},
  author = {T H Rossing},
  year = {1989},
  doi = {10.7326/0003-4819-110-7-502},
  url = {https://pubmed.ncbi.nlm.nih.gov/2647013/},
  note = {Source identifier: 2647013}
}