Full text
PDFPage 1636
. 1988 Dec 24;297(6664):1636. doi: 10.1136/bmj.297.6664.1636
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.
