Gastro-esophageal reflux disease (GERD) is a chronic gastrointestinal  condition where acidic stomach content frequently flows back into the esophagus. The classic symptoms are heartburn (retrosternal burning pain), epigastric pain and regurgitation often provoked by bending, straining or lying down. But most patients do not experience all three. In western societies, the gastroesophageal reflux disease is…