@misc{indiciaeb2732537b444,
  title = {Central airway obstruction.},
  author = {Armin Ernst and David Feller-Kopman and Heinrich D Becker and Atul C Mehta},
  year = {2004},
  doi = {10.1164/rccm.200210-1181so},
  url = {https://pubmed.ncbi.nlm.nih.gov/15187010/},
  note = {Source identifier: 15187010}
}