@inbook{1169188385, author={Shivani Patel and Scott Roberts and Vanessa Rogers and Ashley Zink and Elaine Duryea and Jamie Morgan}, title={Analgesia obstétrica y anestesia}, booktitle={Williams Obstetricia. Guía de estudio, 25e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2020}, url={accessmedicina.mhmedical.com/content.aspx?aid=1169188385} }