International Journal of Respiration, Volume 31, Issue 16,2011, Pages 1239-1242, doi:10.3760/cma.j.issn.1673-436X.2011.016.010
International Journal of Respiration, Volume 31, Issue 16,2011, Pages 1208-1211, doi:10.3760/cma.j.issn.1673-436X.2011.016.002
International Journal of Respiration, Volume 31, Issue 16,2011, Pages 1243-1247, doi:10.3760/cma.j.issn.1673-436X.2011.016.011
International Journal of Respiration, Volume 31, Issue 16,2011, Pages 1216-1220, doi:10.3760/cma.j.issn.1673-436X.2011.016.004
International Journal of Respiration, Volume 31, Issue 16,2011, Pages 1259-1263, doi:10.3760/cma.j.issn.1673-436X.2011.016.015