esophageal dysmotility treatmentesophageal dysmotility syndromescleroderma esophageal dysmotilitymoderate esophageal dysmotilitysevere esophageal dysmotilitydistal esophageal dysmotilitymild esophageal dysmotilitydysmotility oesophagusesophageal disorders symptomsesophagus dysmotilityesophageal dysphagiaesophageal inflammation treatment