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.
Ptok M, Berger R, von Deuster C, Gross M, Lamprecht-Dinnesen A, Nickisch A, Radü HJ, Uttenweiler V.Ptok M, et al.HNO. 2000 May;48(5):357-60. doi: 10.1007/s001060050580.HNO. 2000.PMID: 10872115Review.German.No abstract available.