INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 6,2009, Pages 349-355, doi:10.3760/cma.j.issn.1673-436X.2009.06.008
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 6,2009, Pages 361-365, doi:10.3760/cma.j.issn.1673-436X.2009.06.010
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 6,2009, Pages 339-342, doi:10.3760/cma.j.issn.1673-436X.2009.06.005
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 6,2009, Pages 370-374, doi:10.3760/cma.j.issn.1673-436X.2009.06.012
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 6,2009, Pages 321-325, doi:10.3760/cma.j.issn.1673-436X.2009.06.001