How long were you near somebody else who handled this air contaminant:Time:Pt:^Patient:Qn:RIOPA
how long were you near somebody else who handled this air contaminant:time:pt:^patient:qn:riopa
How long were you near somebody else who handled this air contaminant:Time:To identify measures at a point in time:^Patient:Quantitative:RIOPA
how long were you near somebody else who handled this air contaminant:time:to identify measures at a point in time:^patient:quantitative:riopa