INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 17,2008, Pages 1081-1084, doi:10.3760/cma.j.issn.1673-436X.2008.17.016
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INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 17,2008, Pages 1077-1080, doi:10.3760/cma.j.issn.1673-436X.2008.17.015
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INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 17,2008, Pages 1038-1041, doi:10.3760/cma.j.issn.1673-436X.2008.17.005