Statement 2: Non-erosive reflux disease is a subcategory of gastroesophageal reflux disease. It is characterized by troublesome reflux symptoms with abnormally increased gastroesophageal reflux observed on 24-hour ambulatory pH-impedance monitoring in the absence of esophageal mucosal injury confirmed on endoscopy.      Level of evidence: not applicable (NA)      Strength of recommendation: NA      Experts’ opinions: agree strongly (75.6%), agree with some reservations (22.2%), undecided (2.2%), disagree (0.0%), and disagree strongly (0.0%)