HTP	heated tobacco products
sICAM-1	soluble intercellular adhesion molecule 1
8-epi-PGF2α	8-epi-prostaglandin F2α
11-DTX-B2	11-dehydro-thromboxane B2
HDL	high density lipoprotein
FEV1	forced expiratory volume in 1 s
IQOS	I-Quit-Ordinary-Smoking
PMI	Philip Morris International
JTI	Japan Tobacco International
BAT	British American Tobacco
HNB, HnB	heat-non-burn
THS 2.2	The Tobacco Heating System 2.2
CC	Smoking conventional cigarettes
HPHC	the harmful and potentially harmful constituents
COHb	Carboxyhemoglobin
S-PMA	S-phenylmercapturic acid
MHBMA	Monohydroxybutenyl mercapturic acid
3-HPMA	3-hydroxypropylmercapturic acid
NNN	N-nitrosonornicotine
Total NNN	Total N-nitrosonornicotine
Total NNAL	Total 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol
o-tol	o-toluidine
1-OHP	Total 1-hydroxypyrene
4-ABP	4-aminobiphenyl
1-NA	1-aminonaphthalene
2-NA	2-aminonaphthalene
CEMA	2-cyanoethylmercapturic acid
HEMA	2-hydroxyethylmercapturic acid
3-HMPMA	3-hydroxy-1-methylpropylmercapturic acid
Total 3-OH-B [a] P 3	hydroxy-benzo(a)pyrene
SA	smoking abstinence group
CYP1A2	Cytochrome 1 A2 activity
CHTP	carbon-heated tobacco product
mTHS	The menthol Tobacco Heating System 2.2
mCC	menthol cigarettes
WBC	white blood cells
hs-CRP	high-sensitivity C-reactive protein
THS 2.1	The Tobacco Heating System 2.1
CO	carbon monoxide
HNBC	heat-not-burn cigarette
EVC	electronic vaping cigarettes
TC	traditional tobacco combustion cigarettes
Nox2 soluble Nox2	derived peptide
8-izo-PGF2α-III	8-iso-prostaglandin F-2α-III, pmol/L
BoE	biomarkers of exposure
NNAL	4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol
HMPMA	eCO exhaled breath carbon monoxide
MHBMA	monohydroxy-3-butenyl-mercapturic acid
H292	human bronchial epithelial cells
IL-1β	interleukin (IL)-1β
IL-6	interleukin (IL)- 6
BOPH	biomarkers of potential harm
TPM	total particulate matter
3R4F	reference cigarette smoke
PAFR	platelet-activating factor receptor
CSE	cigarette-smoke-extract
ASM	airway smooth muscle
EMT	epithelial mesenchymal transition
BEAS-2B	human bronchial epithelial cells
CS	cigarette smoke
AEP	acute eosinophilic pneumonia
HNBC	heat-not-burn cigarette
ECMO	extracorporeal membrane oxygenation
HC	heat-not-burn cigarettes
ECIG	electronic cigarettes
LLTV	loose-leaf tobacco vaporiser
MRTP	modified risk tobacco products
THR	Tobacco Harm Reduction
TNeq	total nicotine equivalents (nicotine, cotinine, 3-hydroxycotinine and their glucuronide conjugates)
PAHs	Polycyclic aromatic hydrocarbons