BT	Breath test
SIMO	Small intestinal microbial overgrowth
SIBO	Small intestinal bacterial overgrowth
IMO	Intestinal methanogen overgrowth
LBT	Lactulose breath test
GBT	Glucose breath test
CH4	Methane
H2	Hydrogen
BMI	Body mass index
PPV	Positive predictive value
NPV	Negative predictive value