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.
Myers EW, Miller W.Myers EW, et al. Among authors: miller w.Bull Math Biol. 1989;51(1):5-37. doi: 10.1007/BF02458834.Bull Math Biol. 1989.PMID: 2706401