Full text
PDFPage 621
. 1993 Jul;30(7):621. doi: 10.1136/jmg.30.7.621-a
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.