@inbook{1183458923, author={Alan H. DeCherney and Lauren Nathan and Neri Laufer and Ashley S. Roman}, title={Prefacio}, booktitle={Diagnóstico y tratamiento ginecoobstétricos, 12e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2021}, url={accessmedicina.mhmedical.com/content.aspx?aid=1183458923} }