Study participants who had ever used electronic cigarettes even one or two times were referred to as e-cigarette ever-users, while those who reported current use in the past 30 days were classified as e-cigarette current users. Participants who had used electronic cigarettes in the past but not in the past 30 days were defined as e-cigarette ex-users, and those who had never used electronic cigarettes (even one or two times) were categorized as e-cigarette never users. For e-cigarette users, their consumption patterns were assessed by determining the type of e-cigarette they used (disposable, pre-filled cartridge, or refillable tank), their preferred flavor choice (fruit/mint or menthol/bubble gum/cinnamon/chocolate/other), total amount of cartridge use in milliliters for refillable devices per month, the number of days e-cigarettes were used in the past 30 days, and the age at which they began using e-cigarettes
Even on weekends or vacations, smokers may struggle to reset their internal rhythm
In LUSC, a subtype strongly linked to smoking, NRF2 was significantly upregulated ( P 200 m in diameter), indicating enhanced growth potential under chronic exposure (Fig
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