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Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes to antirheumatic drug therapy in patients with osteoarthritis of the hip or knee.

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Rating Systems in the Evaluation of Knee Ligament Injuries

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Rationale, of The Knee Society Clinical Rating System

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The COSMIN checklist for assessing the methodological quality of studies on measurement properties of health status measurement instruments: an international Delphi study

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