Full text
PDFPage 1315
. 1989 Nov 25;299(6711):1315. doi: 10.1136/bmj.299.6711.1315
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.