A brief self-administered questionnaire to determine functional capacity (The Duke Activity Status Index)
Mark A. Hlatky(Duke Medical Center), Robin Boineau(Duke Medical Center), Michael B. Higginbotham(Duke Medical Center), Kerry L. Lee(Duke Medical Center), Daniel B. Mark(Duke Medical Center), Robert M. Califf(Duke Medical Center), Frederick R. Cobb(Duke Medical Center), David B. Pryor(Duke Medical Center)
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