International Journal of Respiration, Volume 32, Issue 16,2012, Pages 1201-1206, doi:10.3760/cma.j.issn.1673-436X.2012.16.001
International Journal of Respiration, Volume 32, Issue 16,2012, Pages 1214-1217, doi:10.3760/cma.j.issn.1673-436X.2012.016.004
International Journal of Respiration, Volume 32, Issue 16,2012, Pages 1226-1229, doi:10.3760/cma.j.issn.1673-436X.2012.016.007
International Journal of Respiration, Volume 32, Issue 16,2012, Pages 1221-1225, doi:10.3760/cma.j.issn.1673-436X.2012.016.006
International Journal of Respiration, Volume 32, Issue 16,2012, Pages 1240-1244, doi:10.3760/cma.j.issn.1673-436X.2012.016.010