1. Gastrointestinal problems in the community and in general practice;Jones,1993
2. The burden of gastrointestinal and liver diseases in GI epidemiology;Shaheen,2007
3. The burden of gastrointestinal and liver diseases, 2006;Shaheen;Am J Gastroenterol,2006
4. The burden of selected digestive disease in the United States;Sandler;Gastroenterol,2002
5. Burden of gastrointestinal, liver, and pancreatic diseases in the United States;Peery;Gastroenterology,2015