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Filters: Author is Hays, R. D. and First Letter Of Keyword is U [Clear All Filters]
. (2000). Item response theory and health outcomes measurement in the 21st century. Medical Care, 38, II28-II42.
. (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.