International Journal of Respiration, Volume 32, Issue 3,2012, Pages 236-240, doi:10.3760/cma.j.issn.1673-436X.2012.003.018
International Journal of Respiration, Volume 32, Issue 3,2012, Pages 188-192, doi:10.3760/cma.j.issn.1673-436X.2012.003.006
International Journal of Respiration, Volume 32, Issue 3,2012, Pages 215-218, doi:10.3760/cma.j.issn.1673-436X.2012.003.013
International Journal of Respiration, Volume 32, Issue 3,2012, Pages 193-196, doi:10.3760/cma.j.issn.1673-436X.2012.003.007
International Journal of Respiration, Volume 32, Issue 3,2012, Pages 177-181, doi:10.3760/cma.j.issn.1673-436X.2012.003.004