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Determination of the minimal clinically important difference scores for the Cystic Fibrosis Questionnaire-Revised respiratory symptom scale in two populations of patients with cystic fibrosis and chronic Pseudomonas aeruginosa airway infection.
Quittner AL, Modi AC, Wainwright C, Otto K, Kirihara J, Montgomery AB. Quittner AL, et al. Chest. 2009 Jun;135(6):1610-1618. doi: 10.1378/chest.08-1190. Epub 2009 May 15. Chest. 2009. PMID: 19447923 Free PMC article. Review.