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.
Wu H, Zhu K, Levin LI, Gorham E, Levine RS, Shah M, Potter J.Wu H, et al. Among authors: levin li.Ann Epidemiol. 2006 May;16(5):400-5. doi: 10.1016/j.annepidem.2005.09.003. Epub 2005 Oct 24.Ann Epidemiol. 2006.PMID: 16246581
Diepstra A, Nolte IM, van den Berg A, Magpantay LI, Martínez-Maza O, Levin LI.Diepstra A, et al. Among authors: levin li.Blood. 2023 Nov 30;142(22):1928-1931. doi: 10.1182/blood.2023020959.Blood. 2023.PMID: 37748137Free PMC article.