Among the chemicals formed during vaping, formaldehyde is one of the most studied in cancer research
The first smoke of the day, the last smoke of the day
The X-ray diffraction photos of A DNA were blurry compared to those of B DNA
"Art de la publicit, vente aux enchres, 16 fvrier 2013" (PDF)
The following covariates were included in the final models: age (1824 years, 2544 years, 4564 years, 65 + years), gender (male, female), race/ethnicity (non-Hispanic white, non-Hispanic black, non-Hispanic other, Hispanic), education background (less than college, some college, college graduate), poverty level (below poverty level, near poverty level, above poverty level), user subgroups (i.e., defined in Table 1), and years of smoking cigarettes fairly regularly (for respondents who have smoked fairly regularly)