Full text
PDF
. 1993 Jan;68(1 Spec No):66–67. doi: 10.1136/adc.68.1_spec_no.66
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.
