@misc{indiciaed9dbbc118931,
  title = {Combination bronchodilator therapy in COPD.},
  author = {S I Rennard},
  year = {1995},
  doi = {10.1378/chest.107.5\_supplement.171s},
  url = {https://pubmed.ncbi.nlm.nih.gov/7743822/},
  note = {Source identifier: 7743822}
}