International Journal of Respiration, Volume 32, Issue 17,2012, Pages 1323-1326, doi:10.3760/cma.j.issn.1673-436X.2012.017.011
International Journal of Respiration, Volume 32, Issue 17,2012, Pages 1297-1300, doi:10.3760/cma.j.issn.1673-436X.2012.017.005
International Journal of Respiration, Volume 32, Issue 17,2012, Pages 1305-1309, doi:10.3760/cma.j.issn.1673-436X.2012.017.007
International Journal of Respiration, Volume 32, Issue 17,2012, Pages 1319-1322, doi:10.3760/cma.j.issn.1673-436X.2012.017.010
International Journal of Respiration, Volume 32, Issue 17,2012, Pages 1345-1348, doi:10.3760/cma.j.issn.1673-436X.2012.017.016