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.
Cattaruzza MS, Maisonneuve P, Boyle P.Cattaruzza MS, et al.Eur J Cancer B Oral Oncol. 1996 Sep;32B(5):293-305. doi: 10.1016/0964-1955(96)00002-4.Eur J Cancer B Oral Oncol. 1996.PMID: 8944832Review.