@misc{indiciaea0dde940c104,
  title = {Ipratropium bromide: an additive effect?},
  author = {R L Henry},
  year = {1990},
  doi = {10.1111/j.1440-1754.1990.tb02407.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1976324/},
  note = {Source identifier: 1976324}
}