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Validation of the International Classification of Functioning, Disability and Health (ICF) Core Set for rheumatoid arthritis from the patient perspective using focus groups

Michaela Coenen, Alarcos Cieza, Tanja A Stamm, Edda Amann, Barbara Kollerits and Gerold Stucki*

Arthritis Research & Therapy 2006, 8:R84  doi:10.1186/ar1956

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