@inbook{1198803465,
author={Michael Katz},
editor={Matthias, Kathryn R. and Katz, Michael D.},
title={COPD},
booktitle={Pharmacotherapy Principles and Practice Study Guide, 6e},
publisher={McGraw Hill},
address={New York, NY},
year={2023},
url={ppp.mhmedical.com/content.aspx?aid=1198803465}
}