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.
Smith JW, Tevethia SS, Levy BM, Rawls WE.Smith JW, et al. Among authors: tevethia ss.J Natl Cancer Inst. 1973 Jun;50(6):1529-39. doi: 10.1093/jnci/50.6.1529.J Natl Cancer Inst. 1973.PMID: 4577768No abstract available.