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.
Bos NA, Meeuwsen CG, De Glopper-Van der Veer E, van den Akker TW, Radl J, Zwaagstra KA, Benner R.Bos NA, et al.Eur J Immunol. 1991 Aug;21(8):1893-8. doi: 10.1002/eji.1830210817.Eur J Immunol. 1991.PMID: 1868874