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.
Soria F, Sun F, Sánchez FM, Ezquerra LJ, Díaz-Güemes I, Usón J.Soria F, et al.Res Vet Sci. 2004 Feb;76(1):69-75. doi: 10.1016/s0034-5288(03)00141-3.Res Vet Sci. 2004.PMID: 14659732