International Journal of Respiration, Volume 32, Issue 21,2012, Pages 1629-1632, doi:10.3760/cma.j.issn.1673-436X.2012.021.008
International Journal of Respiration, Volume 32, Issue 21,2012, Pages 1605-1606, doi:10.3760/cma.j.issn.1673-436X.2012.021.002
International Journal of Respiration, Volume 32, Issue 21,2012, Pages 1655-1660, doi:10.3760/cma.j.issn.1673-436X.2012.021.014
International Journal of Respiration, Volume 32, Issue 21,2012, Pages 1661-1665, doi:10.3760/cma.j.issn.1673-436X.2012.021.015
International Journal of Respiration, Volume 32, Issue 21,2012, Pages 1633-1636, doi:10.3760/cma.j.issn.1673-436X.2012.021.009