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Indications and interpretation of ambulatory reflux monitoring. GERD, gastroesophageal reflux disease; AET, acid exposure time; NRE, number reflux episodes; PPI, proton pump inhibitor; MII-pH, combined pH and intraluminal impedance monitoring; LA, Los Angeles classification; EE, extra-esophageal; ARS, anti-reflux surgery; SI, symptoms index; SAP, symptom association probability; MNBI, mean nocturnal baseline impedance; PSPW, post-swallow reflux-induced peristaltic wave.
