How old were you when you first started smoking cigarettes every day:Time:Pt:^Patient:Qn:TUS-CPS
how old were you when you first started smoking cigarettes every day:time:pt:^patient:qn:tus-cps
How old were you when you first started smoking cigarettes every day:Time:To identify measures at a point in time:^Patient:Quantitative:TUS-CPS
how old were you when you first started smoking cigarettes every day:time:to identify measures at a point in time:^patient:quantitative:tus-cps