Conduct a longitudinal study of dual-users of combustible tobacco cigarettes and electronic nicotine delivery systems (“ENDS”) to assess the effect of different dual use patterns on toxin exposure and risk
Conduct a longitudinal study of dual-users of combustible tobacco cigarettes and electronic nicotine delivery systems to assess the effect of different dual use patterns on toxin exposure and risk
Conduct a longitudinal study of dual-users of combustible tobacco cigarettes and electronic nicotine delivery systems (“ENDS”) to assess the effect of different dual use patterns on toxin exposure and risk