1.
Mapel DW, Roberts M. Spirometry, the St. George’s Respiratory Questionnaire, and other clinical measures as predictors of medical costs and COPD exacerbation events in a prospective cohort. The Chronicles [Internet]. 2015Apr.15 [cited 2024Dec.4];3(10):1-. Available from: https://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/196