Interestingly, NNN could also be quantified in samples from the non-smokers most exposed to SHS, but the concentrations did not correlate with any of the other analytes
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Although convenience sampling may introduce bias, participants were recruited through both online and in-person channels in academic institutions and community settings, which allowed the inclusion of individuals from different age groups, educational levels, occupations, and residential areas, thereby enhancing sample diversity despite the absence of formal stratification or quotas
The artist travels to exotic locales many months of the year, though her home base has been Washington, DC, since 1982