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 [TUS-CPS]
how old were you when you first started smoking cigarettes every day [tus-cps]