International Journal of Respiration, Volume 31, Issue 22,2011, Pages 1681-1684, doi:10.3760/cma.j.issn.1673-436X.2011.022.001
International Journal of Respiration, Volume 31, Issue 22,2011, Pages 1716-1720, doi:10.3760/cma.j.issn.1673-436X.2011.022.008
International Journal of Respiration, Volume 31, Issue 22,2011, Pages 1685-1689, doi:10.3760/cma.j.issn.1673-436X.2011.022.002
International Journal of Respiration, Volume 31, Issue 22,2011, Pages 1751-1754, doi:10.3760/cma.j.issn.1673-436X.2011.022.016
International Journal of Respiration, Volume 31, Issue 22,2011, Pages 1690-1693, doi:10.3760/cma.j.issn.1673-436X.2011.022.003