@inbook{1148910404,
author={Joseph S. Esherick and Daniel S. Clark and Evan D. Slater},
title={Prefacio},
booktitle={Guías prácticas para la atención primaria },
publisher={McGraw-Hill Education},
address={New York, NY},
year={2016},
url={accessmedicina.mhmedical.com/content.aspx?aid=1148910404}
}