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1 Changes of Pulmonary Disability Grades according to the Spirometry Reference Equations
Joung Oh Lee, Byung-Soon Choi
Tuberc Respir Dis.2010;69(2):108-114.   Published online 2010 August 31     DOI: http://dx.doi.org/10.4046/trd.2010.69.2.108
      

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