Poels, P.J.P., T.R.J. Schermer, and C. Van Weel. “Underuse of Spirometry in the Diagnosis of COPD”. Monaldi Archives for Chest Disease 63, no. 4 (December 30, 2005). Accessed November 25, 2024. https://www.monaldi-archives.org/macd/article/view/626.