@inbook{1199673720, author={Sichao Xu and Justin K. Stiles}, editor={Hess, Philip E. and Li, Yunping and Kowalczyk, John J. and Stiles, Justin K.}, title={Percutaneous Umbilical Blood Sampling}, booktitle={Obstetric Anesthesia: Quick References & Practical Guides}, publisher={McGraw Hill}, address={New York, NY}, year={2023}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=1199673720} }