When did the first stroke occur:TmStp:Pt:^Patient:Qn:PhenX
when did the first stroke occur:tmstp:pt:^patient:qn:phenx
When did the first stroke occur:Time Stamp-Date and Time:To identify measures at a point in time:^Patient:Quantitative:PhenX
when did the first stroke occur:time stamp-date and time:to identify measures at a point in time:^patient:quantitative:phenx