International Journal of Respiration, Volume 34, Issue 20,2014, Pages 1571-1575, doi:10.3760/cma.j.issn.1673-436X.2014.20.012
International Journal of Respiration, Volume 34, Issue 20,2014, Pages 1537-1539, doi:10.3760/cma.j.issn.1673-436X.2014.20.004
International Journal of Respiration, Volume 34, Issue 20,2014, Pages 1558-1560, doi:10.3760/cma.j.issn.1673-436X.2014.20.009
International Journal of Respiration, Volume 34, Issue 20,2014, Pages 1521-1525, doi:10.3760/cma.j.issn.1673-436X.2014.20.001
International Journal of Respiration, Volume 34, Issue 20,2014, Pages 1561-1565, doi:10.3760/cma.j.issn.1673-436X.2014.20.010