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.
Browning GF, Chalmers RM, Snodgrass DR, Batt RM, Hart CA, Ormarod SE, Leadon D, Stoneham SJ, Rossdale PD.Browning GF, et al.Equine Vet J. 1991 Nov;23(6):405-9. doi: 10.1111/j.2042-3306.1991.tb03751.x.Equine Vet J. 1991.PMID: 1663866Free PMC article.