Assessment of emotional state An assessment of general mood will be performed by the Profile of Mood Schedule (POMS) and the State-Trait Anxiety Inventory (STAI state) questionnaires before and after the esophageal manometry. The POMS consists of 32 pairs of words that describe different feelings and emotions at the present moment. The STAI state is validated, and widely used questionnaire measuring transitory anxiety states. The scale consists of 20 items, which are answered on a 4-point scale. Scores are expressed as total sum scores.