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A within-subjects trial to test the equivalence of online and paper outcome measures: the Roland Morris Disability Questionnaire

Felicity L Bishop*, Graham Lewis, Scott Harris, Naomi McKay, Philippa Prentice, Haymo Thiel and George T Lewith

BMC Musculoskeletal Disorders 2010, 11:113  doi:10.1186/1471-2474-11-113