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.
Galvez EJ, Crawford PR, Sztul HI, Pysher MJ, Haglin PJ, Williams RE.Galvez EJ, et al. Among authors: crawford pr.Phys Rev Lett. 2003 May 23;90(20):203901. doi: 10.1103/PhysRevLett.90.203901. Epub 2003 May 20.Phys Rev Lett. 2003.PMID: 12785894