CAWI	computer assisted web interviewing
CFP	Cambridge filter pad
CX572	carboxen 572
DNPH	dinitrophenylhydrazine
EFSA	European Food Safety Authority
ICP-MS	inductively-coupled plasma mass spectrometry
LC-MSMS	liquid chromatography—tandem mass spectrometry
LOQ	limit of quantification
MREC	medical research and ethics committee
MOE	margin of exposure
MTBE	methyl-tert butyl ether
NAB	N-nitrosoanabasine
NAT	N′-nitrosoanatabine
NDMA	N-nitrosodimethylamine
NNK	4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone
NNN	N-nitrosonornicotine
NOAEL	No-Observed-Adverse-Effect Level
PG	propylene glycol
PoD	point of departure
TCA	tolerable concentration in air
TSNA	tobacco-specific nitrosamine