Full text
PDFPage 710
. 1970 Oct;45(243):710. doi: 10.1136/adc.45.243.710-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.