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1 Severity Staging of Chronic Obstructive Pulmonary Disease: Differences in Pre- and Post-Bronchodilator Spirometry
Sheng-Hsiang Lin, Ping-Hung Kuo, Sow-Hsong Kuo, Pan-Chyr Yang
Yonsei Med J.2009;50(5):672-676.   Published online 2009 October 21     DOI: http://dx.doi.org/10.3349/ymj.2009.50.5.672
      

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