30 on that chart
The survey included items on age in years (recoded as 5 years intervals from 18 to 80+), gender (female/male), race/ethnicity (non-Hispanic White, non-Hispanic Black, Hispanic, non-Hispanic Multiracial, other), educational level (below high school, graduated from high school, attended college or technical school, graduated from college or technical school), marital status (married, never married or member of unmarried couple, divorced or widowed or separated), income level ( 50000 US$), employment status (employed, homemaker or student, unemployed), body mass index (BMI) (underweight 30 kg/m 2 ), current physical activity or exercise in the last 30 days (Yes/No), health insurance coverage (Yes/No), and needing to see a doctor but not being able to afford it (Yes/No)

However, the concentrations of these three compounds did not increase when 1 L aliquots of the e-cigarette solutions were injected into packed thermal desorption tubes (i.e., multi-bed sorbents) and analyzed via the TD-GC-MS method
Use as you would use any shower gel
1,2 Because young people who use smokeless tobacco can become addicted to nicotine, they may be more likely to also become cigarette smokers