Global burden of COPD has been underestimatedBMJ 2007; 335 doi: https://doi.org/10.1136/bmj.335.7618.472 (Published 06 September 2007) Cite this as: BMJ 2007;335:472
An international study set out to estimate the global prevalence of chronic obstructive pulmonary disease (COPD) and assess its risk factors. So far, 12 sites (from China, Turkey, Austria, South Africa, Iceland, Germany, Poland, Norway, …
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