CCS	Conventional-Cigarette Smoke
ECS	Electronic-Cigarette Smoke
TCS	Transitional Cigarette Smoke
CO	Carbon Monoxide
NO	Nitric Oxide
ROS	Reactive Oxygen Species
SHS	Secondhand Smoke
TSNA	Tobacco-Specific Nitrosamine
PAHs	Polycyclic Aromatic Hydrocarbons
VOCs	Volatile Organic Compounds
H&E	Hematoxylin and Eosin
PG	Propylene Glycol
VG	Vegetable Glycerin
HP	Histopathology