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Filters: First Letter Of Keyword is O and Author is Cella, D. [Clear All Filters]
IRT health outcomes data analysis project: an overview and summary. Quality of Life Research, 16, 121-132.. (2007).
Psychometric evaluation and calibration of health-related quality of life item banks: plans for the Patient-Reported Outcomes Measurement Information System (PROMIS). Medical Care, 45, S22-31. presented at the May.. (2007).