Dawkins et al., 2016
I've the found replacement batteries these past few years to be pretty unreliable
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HPV is really common
Nicotine Pouch Strengths and Their Equivalency Nicotine pouches come in a wide range of strengths, from as low as 2 mg to as high as 20 mg per pouch
Second, we estimated multivariable linear regression models of cigarettes smoked per day, conditional on the frequency of vaping (categorized as every-day, some-days, ever but no longer, never), psychological distress (categorized as NPD, MPD, and SPD), the interaction of vaping and psychological distress (these variables were demeaned, or centered so that main effect coefficients could be directly interpreted 26 ), and other covariates described above