International Journal of Respiration, Volume 32, Issue 19,2012, Pages 1514-1516, doi:10.3760/cma.j.issn.1673-436X.2012.019.018
International Journal of Respiration, Volume 32, Issue 19,2012, Pages 1480-1484, doi:10.3760/cma.j.issn.1673-436X.2012.019.010
International Journal of Respiration, Volume 32, Issue 19,2012, Pages 1463-1465, doi:10.3760/cma.j.issn.1673-436X.2012.019.006
International Journal of Respiration, Volume 32, Issue 19,2012, Pages 1471-1473, doi:10.3760/cma.j.issn.1673-436X.2012.019.008
International Journal of Respiration, Volume 32, Issue 19,2012, Pages 1517-1520, doi:10.3760/cma.j.issn.1673-436X.2012.019.019