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Responsiveness and minimally important difference for the Patient-Reported Outcomes Measurement Information System (PROMIS) 20-item physical functioning short form in a prospective observational study of rheumatoid arthritis

Authors:
Hays, R. D.; Spritzer, K. L.; Fries, J. F.; Krishnan, E.
Journal:
Annals of the Rheumatic Diseases
Year:
2015
DOI