PhenX - tobacco - 30D quantity and frequency - adolescent protocol 030801:-:Pt:^Patient:-:PhenX
phenx - tobacco - 30d quantity and frequency - adolescent protocol 030801:-:pt:^patient:-:phenx
PhenX - tobacco - 30D quantity and frequency - adolescent protocol 030801:-:To identify measures at a point in time:^Patient:-:PhenX
phenx - tobacco - 30d quantity and frequency - adolescent protocol 030801:-:to identify measures at a point in time:^patient:-:phenx