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.
Schwartz A, Hupert J.Schwartz A, et al.Virtual Mentor. 2011 Jan 1;13(1):21-4. doi: 10.1001/virtualmentor.2011.13.1.medu1-1101.Virtual Mentor. 2011.PMID: 23121811Free article.No abstract available.
Semla TP, Schwartz A, Koch H, Nelson C.Semla TP, et al. Among authors: schwartz a.Vital Health Stat 3. 1993 Jan;(27):187-207.Vital Health Stat 3. 1993.PMID: 8465258Free article.No abstract available.