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.
Hendrychová H, Tůmová L.Hendrychová H, et al. Among authors: tumova l.Ceska Slov Farm. 2012 Oct;61(5):203-9.Ceska Slov Farm. 2012.PMID: 23256653Review.Czech.