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.
Gardner KM, Ou Shu X, Jin F, Dai Q, Ruan Z, Thompson SJ, Hussey JR, Gao YT, Zheng W.Gardner KM, et al.Am J Ind Med. 2002 Oct;42(4):296-308. doi: 10.1002/ajim.10112.Am J Ind Med. 2002.PMID: 12271477
Boyapati SM, Shu XO, Jin F, Dai Q, Ruan Z, Gao YT, Zheng W.Boyapati SM, et al.Nutr Cancer. 2003;46(1):38-43. doi: 10.1207/S15327914NC4601_05.Nutr Cancer. 2003.PMID: 12925302