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.
1 From the Johns Hopkins University School of Medicine, Baltimore (R.C.Z., P.B.R.); Stanford University School of Medicine, Stanford, CA (C.G.P., L.B.M.); and Harvard Medical School, Boston (G.Q.D., E.M.H.).
1 From the Johns Hopkins University School of Medicine, Baltimore (R.C.Z., P.B.R.); Stanford University School of Medicine, Stanford, CA (C.G.P., L.B.M.); and Harvard Medical School, Boston (G.Q.D., E.M.H.).