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Are Scores on English and French Versions of the PHQ-9 Comparable? An Assessment of Differential Item Functioning
- Erin Arthurs,
- Russell J. Steele,
- Marie Hudson,
- Murray Baron,
- Brett D. Thombs,
- (CSRG) Canadian Scleroderma Research Group
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- Published: December 14, 2012
- https://doi.org/10.1371/journal.pone.0052028