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.
Coico R, Kachur E, Lima V, Lipper S; Association of Medical School Microbiology and Immunology Chairs.Coico R, et al. Among authors: lipper s.Acad Med. 2004 Apr;79(4):366-75. doi: 10.1097/00001888-200404000-00019.Acad Med. 2004.PMID: 15044173