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.
Steenland K, Ward E.Steenland K, et al. Among authors: ward e.J Natl Cancer Inst. 1991 Oct 2;83(19):1380-5. doi: 10.1093/jnci/83.19.1380.J Natl Cancer Inst. 1991.PMID: 1920480
Ward E, Okun A, Ruder A, Fingerhut M, Steenland K.Ward E, et al.Am J Ind Med. 1992;22(6):885-904. doi: 10.1002/ajim.4700220610.Am J Ind Med. 1992.PMID: 1463033
Ward E, Carpenter A, Markowitz S, Roberts D, Halperin W.Ward E, et al.J Natl Cancer Inst. 1991 Apr 3;83(7):501-6. doi: 10.1093/jnci/83.7.501.J Natl Cancer Inst. 1991.PMID: 2005633