@inbook{1199673144, author={Philip E. Hess and Yunping Li and John J. Kowalczyk and Justin K. Stiles}, title={Preface}, booktitle={Obstetric Anesthesia: Quick References & Practical Guides}, publisher={McGraw Hill}, address={New York, NY}, year={2023}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=1199673144} }