International Journal of Respiration, Volume 32, Issue 18,2012, Pages 1393-1395, doi:10.3760/cma.j.issn.1673-436X.2012.018.007
International Journal of Respiration, Volume 32, Issue 18,2012, Pages 1373-1377, doi:10.3760/cma.j.issn.1673-436X.2012.018.003
International Journal of Respiration, Volume 32, Issue 18,2012, Pages 1432-1437, doi:10.3760/cma.j.issn.1673-436X.2012.018.017
International Journal of Respiration, Volume 32, Issue 18,2012, Pages 1416-1419, doi:10.3760/cma.j.issn.1673-436X.2012.018.014
International Journal of Respiration, Volume 32, Issue 18,2012, Pages 1361-1365, doi:10.3760/cma.j.issn.1673-436X.2012.018.001