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.
W. Grant Thompson, Chief, Division of Gastroenterology, Ottawa Civic Hospital, and Professor of Medicine, University of Ottawa.
K.W. Heaton, Reader in Medicine, University of Bristol Department of Medicine, Bristol Royal Infirmary
