Abbreviations
From the following article
Ronnie Fass and Ram Dickman
GI Motility online (2006)
doi:10.1038/gimo42
GER
gastroesophageal reflux
GERD
gastroesophageal reflux disease
GI
gastrointestinal
LES
lower esophageal sphincter
NERD
nonerosive reflux disease
PPI
proton pump inhibitor
SAP
symptom association probability
SI
symptom index
TLESR
transient lower esophageal sphincter relaxation