An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Bhatia K; Group of Obstetric Anaesthetists of Lancashire, Greater Manchester and Mersey Study Collaborators.Bhatia K, et al.Anaesthesia. 2022 Apr;77(4):389-397. doi: 10.1111/anae.15672. Epub 2022 Feb 28.Anaesthesia. 2022.PMID: 35226768Free PMC article.