@inbook{6881747, author={Anne Mejia-Downs and Kathy Lee Bishop}, editor={DeTurk, William E. and Cahalin, Lawrence P.}, title={Chapter 17. Physical Therapy Associated with Airway Clearance Dysfunction}, booktitle={Cardiovascular and Pulmonary Physical Therapy: An Evidence-Based Approach, 2e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2011}, url={accessphysiotherapy.mhmedical.com/content.aspx?aid=6881747} }