@misc{indiciae9fc65f607f44,
  title = {Anticholinergic agents in COPD.},
  author = {N J Gross},
  year = {1987},
  doi = {10.1378/chest.91.5\_supplement.52s},
  url = {https://pubmed.ncbi.nlm.nih.gov/3552471/},
  note = {Source identifier: 3552471}
}