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.
Cohen SM, Ellwein LB.Cohen SM, et al. Among authors: ellwein lb.Toxicol Lett. 1988 Oct;43(1-3):151-73. doi: 10.1016/0378-4274(88)90026-4.Toxicol Lett. 1988.PMID: 3051522Review.