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.
Grahammer F, Fischer KG.Grahammer F, et al. Among authors: fischer kg.BMJ Case Rep. 2015 Aug 30;2015:bcr2015210034. doi: 10.1136/bcr-2015-210034.BMJ Case Rep. 2015.PMID: 26323976Free PMC article.