International Journal of Respiration, Volume 31, Issue 23,2011, Pages 1783-1787, doi:10.3760/cma.j.issn.1673-436X.2011.023.006
International Journal of Respiration, Volume 31, Issue 23,2011, Pages 1796-1800, doi:10.3760/cma.j.issn.1673-436X.2011.023.009
International Journal of Respiration, Volume 31, Issue 23,2011, Pages 1761-1765, doi:10.3760/cma.j.issn.1673-436X.2011.023.001
International Journal of Respiration, Volume 31, Issue 23,2011, Pages 1801-1805, doi:10.3760/cma.j.issn.1673-436X.2011.023.010
International Journal of Respiration, Volume 31, Issue 23,2011, Pages 1811-1814, doi:10.3760/cma.j.issn.1673-436X.2011.023.012