... withgreater levels of impaired activities, symptoms, and poorer quality of life for the COPD sample and greaterlevels of impaired activities, symptoms, social function-ing, and poorer quality of life ... and Research Leader for all UK activities,including study design and direction, interpretation of data; and reporting of data. GAG developed the concep-tual need for such work in the area of ... design and criticalcontent of the research study. DAR served as PrincipalInvestigator and Research Leader for all US activities,including study design and direction, interpretation of data; and...