ABCG1	ATP-binding cassette transporter G1
ADC	Adenocarcinoma
AKT	Serine-threonine kinase
AOC	Antioxidant capacity
AP-1	Activator protein-1
BCX	β-cryptoxanthin
BRAF	v-raf murine sarcoma viral oncogene homolog B1
CS	Cigarette smoke
CuZnSOD	Copper-zinc superoxide dismutase
Cx43	Connexin-43
DDR2	Discoidin Domain Receptor Tyrosine Kinase 2
EGFR	Epidermal growth factor receptor
EGFR-TKI	EGFR tyrosine kinase inhibitor
EML4-ALK	Echinoderm microtubule–associate protein like 4/anaplastic lymphoma kinase
ERK	Extracellular signal-regulated kinase
FFQ	Food frequency questionnaire
FGFR	Fibroblast growth factor receptor
GPx	Glutathione peroxidase
GSH	Glutathione
HO-1	Heme oxygenase-1
α7nAChR	homomeric α7 nicotinic acetylcholine receptor
8OHdG	8-hydroxy-20-deoxyguanosine
H2O2	Hydrogen peroxide
IFN-γ	Interferons
IL-	Interleukin
8-iso-PGF2α	Isoprostane-8-iso prostaglandin F2α
JNK	c-JUN NH2-terminal kinase
KRAS	Kirsten rat sarcoma viral oncogene homolog
LC	Lung cancer
LP	Lipid peroxidation
LSH	Lymphoid-specific helicase
LXRα	Liver X receptor-α
MDA	Malondialdehyde
MMP	Metalloproteinase
MPO	Myeloperoxidase
mTOR	mammalian target of rapamycin
NEIL	Nei like DNA glycosylases
NF-κB	Transcription factor-kappaB
NNAL	Nicotine equivalents and total 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol
NNK	N-nitrosamines
NO	Nitric oxide
NO2	Nitrogen oxides
NOS	Nitric oxide synthase
NSCLC	Non-small-cell lung cancer
OGG1	8-oxoguanine DNA glycosylase
OS	Oxidative stress
PARP	Poly ADP ribose polymerase
P21	Protein 21
P53	Protein 53
PD-1	Anti-programmed death receptor 1
PI3K	Phosphatidylinositol-3 kinase
PON1	Paraoxonase 1
PPARα	Peroxisome proliferator-activated receptor α
PTEN	Phosphatase and tensin homolog
RA	Retinoid acid
RARβ	RA receptor beta
SIRT1	Sirtuin 1
ROS	Reactive oxygen species
ROS1	ROS Proto-Oncogene 1, Receptor Tyrosine Kinase 1
RCTs	Randomised controlled trials
SCC	Squamous cell carcinoma
SCD-1	Stearoyl-coa desaturase-1
SCLC	Small-cell lung cancer
SHS	Secondhand smoke
SICAM-1	Soluble intercellular adhesion molecule-1
Smad	deca-pentaplegic homolog
SOD	Superoxide dismutase
SOX2	SRY-Box Transcription Factor 2
TNFα	Tumor necrosis factor-α
VEGF	Vascular endothelial growth factor