1. All About Heartburn,1999
2. Methodological aspects of evaluation of quality of life in upper gastrointestinal diseases;Dimenas;Scand J Gastroenterol,1993
3. Update in gastroenterology;Greenberger;Ann Intern Med,1998
4. The epidemiology of gastroesophageal reflux disease;Eisen;Am J Gastroenterol,1996
5. Structure and function of the digestive system;Huether,1996