![]() ResearchHealth status measurement in COPD: the minimal clinically important difference of the clinical COPD questionnaire1 Department of General Practice University Medical Center Groningen, The Netherlands 2 Department of Pulmonary Diseases, Isala klinieken, Zwolle, The Netherlands 3 AstraZeneca R&D, Lund, Sweden 4 Primary Care Respiratory Medicine, University of Aberdeen, UK
Respiratory Research 2006, 7:62doi:10.1186/1465-9921-7-62
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