http://www.helico.com/ information about the bug that can cause ulcers

http://digestive.niddk.nih.gov/ddiseases/pubs/hpylori/ information about ulcers from the National Digestive Diseases Information Clearinghouse

http://digestive.niddk.nih.gov/ddiseases/pubs/bleeding/ information about bleeding in the digestive tract from the National Digestive Diseases Information Clearinghouse

http://www.anisman.com/ecg/index.asp?mainpage=gi_bleed.htm information from the Emergency Clinical Guide

http://digestive.niddk.nih.gov/ddiseases/pubs/zollinger/ information from the National Digestive Diseases Information Clearinghouse

http://www.stopgettingsick.com/Conditions/condition_template.cfm/2685/316/1 information from stopgettingsick.com

http://digestive.niddk.nih.gov/ddiseases/pubs/gastroparesis/ information from the National Digestive Diseases Information Clearinghouse

http://cms.clevelandclinic.org/digestivedisease/ information from the Cleveland Clinic

http://www.cancer.org/docroot/cri/cri_2x.asp?sitearea=cri&dt=40 information from the American Cancer Society

http://www.nlm.nih.gov/medlineplus/ency/article/000223.htm information from MedlinePlus