@inbook{1148437600, author={Mark A. Schumacher and Allan I. Basbaum and Ramana K. Naidu}, editor={Katzung, Bertram G.}, title={Opioid Agonists & Antagonists}, booktitle={Basic & Clinical Pharmacology, 14e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accesspharmacy.mhmedical.com/content.aspx?aid=1148437600} }