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.
O'Brien TF, Pla MP, Mayer KH, Kishi H, Gilleece E, Syvanen M, Hopkins JD.O'Brien TF, et al. Among authors: syvanen m.Science. 1985 Oct 4;230(4721):87-8. doi: 10.1126/science.2994226.Science. 1985.PMID: 2994226
Hopkins JD, Clements MB, Liang TY, Isberg RR, Syvanen M.Hopkins JD, et al. Among authors: syvanen m.Proc Natl Acad Sci U S A. 1980 May;77(5):2814-8. doi: 10.1073/pnas.77.5.2814.Proc Natl Acad Sci U S A. 1980.PMID: 6248868Free PMC article.