Esophageal disorders. Role of motility studies.
D004931:Esophageal Achalasia; D004935:Esophageal Diseases; D004947:Esophagus; D006801:Humans; D010781:Photography; D012595:Scleroderma, Systemic
CARDIOSPASM; ESOPHAGUS; PHOTOGRAPHY; SCLERODERMA