International Journal of Respiration, Volume 31, Issue 24,2011, Pages 1861-1865, doi:10.3760/cma.j.issn.1673-436X.2011.024.006
International Journal of Respiration, Volume 31, Issue 24,2011, Pages 1900-1904, doi:10.3760/cma.j.issn.1673-436X.2011.024.014
International Journal of Respiration, Volume 31, Issue 24,2011, Pages 1841-1844, doi:10.3760/cma.j.issn.1673-436X.2011.024.001
International Journal of Respiration, Volume 31, Issue 24,2011, Pages 1877-1881, doi:10.3760/cma.j.issn.1673-436X.2011.024.009
International Journal of Respiration, Volume 31, Issue 24,2011, Pages 1891-1895, doi:10.3760/cma.j.issn.1673-436X.2011.024.012