INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 11,2009, Pages 684-687, doi:10.3760/cma.j.issn.1673-436X.2009.011.012
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 11,2009, Pages 672-676, doi:10.3760/cma.j.issn.1673-436X.2009.011.009
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 11,2009, Pages 702-704, doi:10.3760/cma.j.issn.1673-436X.2009.011.017
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 29, Issue 11,2009, Pages 650-653, doi:10.3760/cma.j.issn.1673-436X.2009.011.003