@inbook{1183876579,
author={Gerard Urrutia and Ignacio Ferreira-González and Gordon Guyatt and PJ Devereaux},
editor={Guyatt, Gordon and Rennie, Drummond and Meade, Maureen O. and Cook, Deborah J.},
title={Numbers Needed to Treat},
booktitle={Users' Guides to the Medical Literature: A Manual for Evidence-Based Clinical Practice, 3rd ed},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2015},
url={jamaevidence.mhmedical.com/content.aspx?aid=1183876579}
}