AET	acid exposure time
EGD	esophagogastroduodenoscopy
GERD	gastroesophageal reflux disease
HE	hypercontractile esophagus
HRIM	high-resolution impedance manometry
LES	lower esophageal sphincter
MII-pH	multichannel intraluminal impedance-pH
PPI	proton pump inhibitor
RSI	reflux symptom index
SAP	symptom-associated probability
SGB	supragastric belching
SSc	systemic sclerosis