Below 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.sts.org
The Society of Thoracic Surgeons: Patient Information
digestive.niddk.nih.gov
National Digestive Diseases Information Clearinghouse (NDDIC)
www.nlm.nih.gov/medlineplus
MedlinePlus, National Library of Medicine