Statement 14: Esophageal manometry is useful in assessing the peristaltic function and exclusion of alternative motility disorders. Therefore, esophageal manometry should be performed before anti-reflux surgery in patients with gastroesophageal reflux disease.      Level of evidence: low      Strength of recommendation, strong      Experts’ opinions: agree strongly (57.8%), agree with some reservations (37.8%), undecided (4.4%), disagree (0.0%), and disagree strongly (0.0%)