International Journal of Respiration, Volume 32, Issue 15,2012, Pages 1150-1153, doi:10.3760/cma.j.issn.1673-436X.2012.015.007
International Journal of Respiration, Volume 32, Issue 15,2012, Pages 1180-1183, doi:10.3760/cma.j.issn.1673-436X.2012.015.015
International Journal of Respiration, Volume 32, Issue 15,2012, Pages 1176-1179, doi:10.3760/cma.j.issn.1673-436X.2012.015.014
International Journal of Respiration, Volume 32, Issue 15,2012, Pages 1162-1164, doi:10.3760/cma.j.issn.1673-436X.2012.015.010
International Journal of Respiration, Volume 32, Issue 15,2012, Pages 1165-1167, doi:10.3760/cma.j.issn.1673-436X.2012.015.011