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.
Skrzypek E, Mlosek RK.Skrzypek E, et al. Among authors: mlosek rk.J Ultrason. 2021;20(83):e261-e267. doi: 10.15557/JoU.2020.0046. Epub 2020 Dec 18.J Ultrason. 2021.PMID: 33500793Free PMC article.