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.
Liu S, Manson JE, Stampfer MJ, Hu FB, Giovannucci E, Colditz GA, Hennekens CH, Willett WC.Liu S, et al. Among authors: hennekens ch.Am J Public Health. 2000 Sep;90(9):1409-15. doi: 10.2105/ajph.90.9.1409.Am J Public Health. 2000.PMID: 10983198Free PMC article.
Liu S, Ajani U, Chae C, Hennekens C, Buring JE, Manson JE.Liu S, et al.JAMA. 1999 Sep 15;282(11):1073-5. doi: 10.1001/jama.282.11.1073.JAMA. 1999.PMID: 10493207Clinical Trial.