@inbook{1001229778, author={O. John Ma and James R. Mateer and Robert F. Reardon and Scott A. Joing}, title={}, booktitle={Ma and Mateer's Emergency Ultrasound, 3e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2014}, url={accessemergencymedicine.mhmedical.com/content.aspx?aid=1001229778} }