“…Recurrence was determined by symptoms, 13,17,21,23,24,28,30 symptoms and use of medical therapy, 14,34,38 symptoms and upper gastrointestinal series, 15,18,27,37 symptoms, upper gastrointestinal series and endoscopy, 32 or symptoms and pH monitoring 19,25,29 . Some studies did not report how recurrence was defined 31,33,36,40,41 …”