During the past 3Mo, how many severe or very unpleasant attacks of chest trouble have you had:NRat:3Mo:^Patient:Qn:PhenX
during the past 3mo, how many severe or very unpleasant attacks of chest trouble have you had:nrat:3mo:^patient:qn:phenx
During the past 3 months, how many severe or very unpleasant attacks of chest trouble have you had [PhenX]
during the past 3 months, how many severe or very unpleasant attacks of chest trouble have you had [phenx]