Serdal Kenan Köse et al. 2010. Psychometric Properties of the Health Assessment Questionnaire Disability Index (HAQ-DI) and the Modified Health Assessment Questionnaire (MHAQ) in Patients with Knee Osteoarthritis. Archives of Rheumatology. 25, 3 (Sep. 2010), 147–155. DOI:https://doi.org/10.5152/tjr.2010.19.