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.
Ringdahl A, Eriksson-Mangold M, Israelsson B, Lindkvist A, Mangold S.Ringdahl A, et al.Br J Audiol. 1990 Aug;24(4):235-42. doi: 10.3109/03005369009076562.Br J Audiol. 1990.PMID: 2224290Clinical Trial.
Ringdahl A, Eriksson-Mangold M, Andersson G.Ringdahl A, et al.Br J Audiol. 1998 Dec;32(6):375-85. doi: 10.3109/03005364000000089.Br J Audiol. 1998.PMID: 10064420