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.
Walmsley AD, Hickson FS, Laird WR, Williams AR.Walmsley AD, et al. Among authors: williams ar.Br Dent J. 1987 Mar 21;162(6):221-4. doi: 10.1038/sj.bdj.4806085.Br Dent J. 1987.PMID: 3548782No abstract available.
Walmsley AD, Williams AR.Walmsley AD, et al. Among authors: williams ar.J Endod. 1989 May;15(5):189-94. doi: 10.1016/S0099-2399(89)80233-X.J Endod. 1989.PMID: 2607288
Walmsley AD, Williams AR.Walmsley AD, et al. Among authors: williams ar.J Dent. 1991 Feb;19(1):62-6. doi: 10.1016/0300-5712(91)90044-y.J Dent. 1991.PMID: 2016428