14CDXLBT	14C-D-Xylose and Lactulose Breath Tests
FODMAPs	Fructose, Oligosaccharides, Disaccharides, Monosaccharides and Polyols
GHBT	Glucose Hydrogen Breath Test
HBV	Hepatitis virus B
HCV	Hepatitis virus C
IBS	Irritable Bowel Syndrome
LCHBT	Lactose Hydrogen Breath Test
LHBT	Lactulose Hydrogen Breath Test
LHMBT	Lactulose Hydrogen-Methane Breath Test
NAFLD	Non-alcoholic Fatty Liver Disease
NASH	non-alcoholic hepatitis
PPIs	Proton Pump Inhibitors
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
QDAC	Quantitative Duodenal Aspirate Culture
QJAC	Quantitative Jejunal Aspirate Culture
RCT	Randomized Controlled Trial
ROB	Risk of Bias
SIBO	Small Intestinal Bacterial Overgrowth