BABD	Brisbane Aseptic Biopsy Device
BMI	body mass index
BS	bile salt
CLR	centered log-ratio
dbRDA	distance-based redundancy analysis
EPS	epigastric pain syndrome
FD	functional dyspepsia
FDR	false discovery rate
GI	gastrointestinal
IQR	interquartile range
PAGI-SYM	patient assessment of upper GI symptom severity index
PDS	postprandial distress syndrome
PPI	proton pump inhibitor
SD	standard deviation