International Journal of Respiration, Volume 32, Issue 23,2012, Pages 1812-1815, doi:10.3760/cma.j.issn.1673-436X.2012.023.014
International Journal of Respiration, Volume 32, Issue 23,2012, Pages 1782-1787, doi:10.3760/cma.j.issn.1673-436X.2012.023.007
International Journal of Respiration, Volume 32, Issue 23,2012, Pages 1771-1773, doi:10.3760/cma.j.issn.1673-436X.2012.023.004
International Journal of Respiration, Volume 32, Issue 23,2012, Pages 1821-1824, doi:10.3760/cma.j.issn.1673-436X.2012.023.016
International Journal of Respiration, Volume 32, Issue 23,2012, Pages 1768-1770, doi:10.3760/cma.j.issn.1673-436X.2012.023.003