The role of host-pathogen interactions in chronic obstructive pulmonary disease exacerbations is unclear.

@article{Philpot2007TheRO,
  title={The role of host-pathogen interactions in chronic obstructive pulmonary disease exacerbations is unclear.},
  author={Ray Philpot},
  journal={Internal medicine journal},
  year={2007},
  volume={37 12},
  pages={840; author reply 804-1}
}