INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 23,2008, Pages 1430-1432, doi:10.3760/cma.j.issn.1673-436X.2008.23.007
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INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 23,2008, Pages 1417-1420, doi:10.3760/cma.j.issn.1673-436X.2008.23.003
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 23,2008, Pages 1448-1451, doi:10.3760/cma.j.issn.1673-436X.2008.23.012
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