Gastroesophageal reflux disease (GERD) is very common in western countries. GERD is increasing, has profound effects on health economics, disturbs the patient's health-related quality of life, and increases the risk for development of esophageal adenocarcinoma. GERD is considered to be infrequent in developing countries. This study was performed to determine the prevalence of GERD among Iranians. Major GERD symptoms (heartburn and acid regurgitation) were assessed through an interview by t...