@inbook{1131933026, author={Thomas N. Ward and Morris Levin}, editor={Bajwa, Zahid H. and Wootton, R. Joshua and Warfield, Carol A.}, title={Facial Pain}, booktitle={Principles and Practice of Pain Medicine, 3e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2016}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=1131933026} }