Rasch analysis of three versions of the Oswestry Disability Questionnaire
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PII: S1356-689X(07)00037-9
doi:10.1016/j.math.2007.01.008
© 2007 Elsevier Ltd. All rights reserved.
PII: S1356-689X(07)00037-9
doi:10.1016/j.math.2007.01.008
© 2007 Elsevier Ltd. All rights reserved.