Full text
PDFPage 302
letter . 1996 Feb;38(2):302. doi: 10.1136/gut.38.2.302
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.