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1471-2474-11-113
1471-2474-11-113
http://dx.doi.org/10.1186/1471-2474-11-113
A within-subjects trial to test the equivalence of online and paper outcome measures: the Roland Morris disability questionnaire
P356
Q33596993-73AB4E6C-C079-4F48-8BB7-67AF1D841A0C
P356
1471-2474-11-113
http://dx.doi.org/10.1186/1471-2474-11-113