International Journal of Respiration, Volume 32, Issue 13,2012, Pages 1027-1030, doi:10.3760/cma.j.issn.1673-436X.2012.013.018
International Journal of Respiration, Volume 32, Issue 13,2012, Pages 1031-1034, doi:10.3760/cma.j.issn.1673-436X.2012.013.019
International Journal of Respiration, Volume 32, Issue 13,2012, Pages 1007-1011, doi:10.3760/cma.j.issn.1673-436X.2012.013.013
International Journal of Respiration, Volume 32, Issue 13,2012, Pages 974-977, doi:10.3760/cma.j.issn.1673-436X.2012.013.004
International Journal of Respiration, Volume 32, Issue 13,2012, Pages 1015-1019, doi:10.3760/cma.j.issn.1673-436X.2012.013.015