When did you last take prescription medication for headache on a daily basis to help prevent a severe headache from happening in the first place:Find:Pt:^Patient:Ord:PhenX
when did you last take prescription medication for headache on a daily basis to help prevent a severe headache from happening in the first place:find:pt:^patient:ord:phenx
When did you last take prescription medication for headache on a daily basis to help prevent a severe headache from happening in the first place:Finding:To identify measures at a point in time:^Patient:Ordinal:PhenX
when did you last take prescription medication for headache on a daily basis to help prevent a severe headache from happening in the first place:finding:to identify measures at a point in time:^patient:ordinal:phenx