Original articleResponsiveness and validity in health status measurement: A clarification☆
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This work was supported in part by the Ontario Ministry of Health, the Medical Research Council of Canada, and St Joseph's Hospital Foundation, Hamilton, Ontario. Dr Guyatt is a Career Scientist of the Ontario Ministry of Health. Dr Levine is a Clinical Trials Scholar of the National Cancer Institute of Canada. Dr Charlson is a Henry J. Kaiser Family Foundation faculty scholar in general internal medicine.
Copyright © 1989 Published by Elsevier Inc.