1. Burden of digestive diseases in the United States,2008
2. Overview;Everhart,1994
3. The state of the art of cost-of-illness estimates;Hodgson;Adv Health Econ Health Serv Res,1983
4. Cost of digestive diseases in the United States;Brown,1994
5. The burden of selected digestive diseases in the United States;Sandler;Gastroenterology,2002