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Conflicting reports in the literature of appropriate assay procedures for measurement of cysteine dioxygenase activity led us to evaluate the procedure for assay of cysteine dioxygenase activity in(More)
OBJECTIVE To investigate differential item functioning or item bias of the Rivermead Mobility Index (RMI) and its impact on the drawing of valid comparisons with the RMI between subgroups of patients(More)
OBJECTIVE To enable improved interpretation of the total score and faster scoring of the Rivermead Mobility Index (RMI) by studying item ordering or hierarchy and formulating start-and-stop rules in(More)