INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 4,2008, Pages 201-203, doi:10.3760/cma.j.issn.1673-436X.2008.04.003
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INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 4,2008, Pages 197-200, doi:10.3760/cma.j.issn.1673-436X.2008.04.002
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 4,2008, Pages 210-213, doi:10.3760/cma.j.issn.1673-436X.2008.04.005
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 28, Issue 4,2008, Pages 231-234, doi:10.3760/cma.j.issn.1673-436X.2008.04.010