@misc{indiciae77a3f6185280,
  title = {Optimizing bronchodilator therapy for copd.},
  author = {B J Lipworth},
  year = {2001},
  doi = {10.1378/chest.119.6.1628},
  url = {https://pubmed.ncbi.nlm.nih.gov/11399680/},
  note = {Source identifier: 11399680}
}