![](/img/cover-not-exists.png)
Severity of COPD at initial spirometry-confirmed diagnosis: data from medical charts and administrative claims
Dalal, Anand, Saiers, JaneLanguage:
english
Journal:
International Journal of Chronic Obstructive Pulmonary Disease
DOI:
10.2147/COPD.S16975
Date:
November, 2011
File:
PDF, 255 KB
english, 2011