@misc{indiciaeb12d94268663,
  title = {Verapamil and morphine.},
  author = {A Hollman},
  year = {1991},
  doi = {10.1136/hrt.66.3.198},
  url = {https://pubmed.ncbi.nlm.nih.gov/1931346/},
  note = {Source identifier: 1931346}
}