![Mayo Clinic home page [logo]](/images-global/mayologo.gif)
Give. Touch. Transform.
Share this site with others using one of these sharing tools.
To link to this article, paste this block of HTML code onto your webpage.
Guidelines for sites linking to mayoclinic.orgBelow are some helpful Internet resources on this topic. Mayo Clinic does not own or control any of these sites and is not responsible for their content. Inclusion of these sites does not imply endorsement by Mayo Clinic.
www.gastro.org
The American Gastroenterological Association
www.acg.gi.org
The American College of Gastroenterology
www.nlm.nih.gov/medlineplus
MEDLINEplus National Library of Medicine
www.fascrs.org
American Society of Colon and Rectal Surgeons
.
