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 MM, Fifer WP, Schaeffer L, Sahni R, Ohira-Kist K, Stark RI, Schulze KF.Myers MM, et al. Among authors: fifer wp.Sleep. 1998 Jun 15;21(4):343-9.Sleep. 1998.PMID: 9646378