How many Y were you regularly exposed to this material:Time:Pt:^Patient:Qn:ACSCP Study II
how many y were you regularly exposed to this material:time:pt:^patient:qn:acscp study ii
How many Y were you regularly exposed to this material:Time:To identify measures at a point in time:^Patient:Quantitative:ACSCP Study II
how many y were you regularly exposed to this material:time:to identify measures at a point in time:^patient:quantitative:acscp study ii