International Journal of Respiration, Volume 31, Issue 17,2011, Pages 1303-1305, doi:10.3760/cma.j.issn.1673-436X.2011.017.006
International Journal of Respiration, Volume 31, Issue 17,2011, Pages 1333-1336, doi:10.3760/cma.j.issn.1673-436X.2011.017.013
International Journal of Respiration, Volume 31, Issue 17,2011, Pages 1351-1355, doi:10.3760/cma.j.issn.1673-436X.2011.017.018
International Journal of Respiration, Volume 31, Issue 17,2011, Pages 1306-1308, doi:10.3760/cma.j.issn.1673-436X.2011.017.007
International Journal of Respiration, Volume 31, Issue 17,2011, Pages 1337-1339, doi:10.3760/cma.j.issn.1673-436X.2011.017.014