Fig. 2From: The simplified Chinese version of the Knee Injury and Osteoarthritis Outcomes Score (KOOS) in individuals with knee osteoarthritis for mainland China: the study of reliability and validityFlowchart of participant enrolment. ACR, American College of Rheumatology classification criteria; VAS, Visual Analogue Scale; SF-36, Short Form-36 Health SurveyBack to article page