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APA Citation
Bednarek, M., Maciejewski, J., Wozniak, M., Kuca, P., & Zielinski, J. (2008). prevalence, severity and underdiagnosis of COPD in the primary care setting. Thorax, 63(5), 402–407. http://access.bl.uk/ark:/81055/vdc_100135139743.0x000020