Current age:Time:Pt:^Family member:Qn:USSG-FHT
current age:time:pt:^family member:qn:ussg-fht
Current age:Time:To identify measures at a point in time:^Family member:Quantitative:USSG-FHT
current age:time:to identify measures at a point in time:^family member:quantitative:ussg-fht