<qa>  How many subjects with achalasia, nutcracker esophagusTwenty subjects with abnormal esophageal motility 5 subjects each with achalasia, nutcracker esophagus, scleroderma, diffuse esophageal spasm or hypertensive LES previously referred for clinical esophageal motility testing will be contacted. These twenty subjects must have previously undergone esophageal manometry testing using the standard clinical protocol at the University of Utah motility with solid state manometry catheters. After obtaining informed consent, these twenty subjects will undergo the esophageal manometry using air-filled balloon catheters per the standard clinical protocol. Following the repeat procedure a short one-page questionnaire will be completed by the subject and the motility nurse. 