International Journal of Respiration, Volume 32, Issue 20,2012, Pages 1561-1565, doi:10.3760/cma.j.issn.1673-436X.2012.020.010
International Journal of Respiration, Volume 32, Issue 20,2012, Pages 1587-1590, doi:10.3760/cma.j.issn.1673-436X.2012.020.016
International Journal of Respiration, Volume 32, Issue 20,2012, Pages 1536-1540, doi:10.3760/cma.j.issn.1673-436X.2012.020.005
International Journal of Respiration, Volume 32, Issue 20,2012, Pages 1594-1596, doi:10.3760/cma.j.issn.1673-436X.2012.020.018
International Journal of Respiration, Volume 32, Issue 20,2012, Pages 1541-1544, doi:10.3760/cma.j.issn.1673-436X.2012.020.006