International Journal of Respiration, Volume 32, Issue 22,2012, Pages 1728-1730, doi:10.3760/cma.j.issn.1673-436X.2012.022.009
International Journal of Respiration, Volume 32, Issue 22,2012, Pages 1751-1755, doi:10.3760/cma.j.issn.1673-436X.2012.022.014
International Journal of Respiration, Volume 32, Issue 22,2012, Pages 1720-1724, doi:10.3760/cma.j.issn.1673-436X.2012.022.007
International Journal of Respiration, Volume 32, Issue 22,2012, Pages 1709-1714,1761, doi:10.3760/cma.j.issn.1673-436X.2012.022.005
International Journal of Respiration, Volume 32, Issue 22,2012, Pages 1756-1760, doi:10.3760/cma.j.issn.1673-436X.2012.022.015