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.
Holberg-Petersen M, Steinbakk M, Figenschau KJ, Jantzen E, Eng J, Melby KK.Holberg-Petersen M, et al. Among authors: melby kk.APMIS. 1999 Feb;107(2):231-9.APMIS. 1999.PMID: 10225322