@inbook{1107198906, author={Clark C. Smith and Farooq Khan and Juan Francisco Asenjo and Honorio T. Benzon}, editor={Diwan, Sudhir and Staats, Peter S.}, title={Myofascial Injections (Trigger Point, Piriformis, Iliopsoas, and Scalene Injections)}, booktitle={Atlas of Pain Medicine Procedures}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=1107198906} }