At what age did emphysema start:Time:Pt:^Patient:Qn:PhenX
at what age did emphysema start:time:pt:^patient:qn:phenx
At what age did emphysema start:Time:To identify measures at a point in time:^Patient:Quantitative:PhenX
at what age did emphysema start:time:to identify measures at a point in time:^patient:quantitative:phenx