On the average over the entire time you smoked a pipe, how much pipe tobacco did you smoke per W:NRat:Pt:^Patient:Qn:PhenX
on the average over the entire time you smoked a pipe, how much pipe tobacco did you smoke per w:nrat:pt:^patient:qn:phenx
On the average over the entire time you smoked a pipe, how much pipe tobacco did you smoke per week [PhenX]
on the average over the entire time you smoked a pipe, how much pipe tobacco did you smoke per week [phenx]