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.
Fang JL, Collura CA, Johnson RV, Asay GF, Carey WA, Derleth DP, Lang TR, Kreofsky BL, Colby CE.Fang JL, et al. Among authors: colby ce.Mayo Clin Proc. 2016 Dec;91(12):1735-1743. doi: 10.1016/j.mayocp.2016.08.006. Epub 2016 Nov 22.Mayo Clin Proc. 2016.PMID: 27887680