INTERNATIONAL JOURNAL OF RESPIRATION, Volume 27, Issue 7,2007, Pages 484-488, doi:10.3760/cma.j.issn.1673-436X.2007.07.002
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INTERNATIONAL JOURNAL OF RESPIRATION, Volume 27, Issue 7,2007, Pages 551-553, doi:10.3760/cma.j.issn.1673-436X.2007.07.019
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 27, Issue 7,2007, Pages 528-530, doi:10.3760/cma.j.issn.1673-436X.2007.07.013
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 27, Issue 7,2007, Pages 554-558, doi:10.3760/cma.j.issn.1673-436X.2007.07.020