Resources
Barrett’s Esophagus
http://www.webmd.com/heartburn-gerd/guide/barretts-esophagus-symptoms-causes-and-treatments
Celiac Disease
http://www.webmd.com/digestive-disorders/celiac-disease/celiac-disease-symptoms
Colonoscopy
http://www.webmd.com/colorectal-cancer/colonoscopy-16695
EGD
http://www.nlm.nih.gov/medlineplus/ency/article/003888.htm
