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.
van der Tol PP, Metz JH, Noordhuizen-Stassen EN, Back W, Braam CR, Weijs WA.van der Tol PP, et al. Among authors: metz jh.J Dairy Sci. 2002 Jun;85(6):1476-81. doi: 10.3168/jds.S0022-0302(02)74216-1.J Dairy Sci. 2002.PMID: 12146479Free article.