Full Text
The Full Text of this article is available as a PDF (98.1 KB).
letter . 2002 Dec;11(4):390–391. doi: 10.1136/qhc.11.4.390-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.