@misc{indiciae1e9d56592cfd,
  title = {Ipratropium bromide.},
  author = {N J Gross},
  year = {1988},
  doi = {10.1056/nejm198808253190806},
  url = {https://pubmed.ncbi.nlm.nih.gov/2970009/},
  note = {Source identifier: 2970009}
}