International Journal of Respiration, Volume 34, Issue 22,2014, Pages 1742-1746, doi:10.3760/cma.j.issn.1673-436X.2014.22.015
International Journal of Respiration, Volume 34, Issue 22,2014, Pages 1752-1756, doi:10.3760/cma.j.issn.1673-436X.2014.22.017
International Journal of Respiration, Volume 34, Issue 22,2014, Pages 1710-1714, doi:10.3760/cma.j.issn.1673-436X.2014.22.008
International Journal of Respiration, Volume 34, Issue 22,2014, Pages 1699-1702, doi:10.3760/cma.j.issn.1673-436X.2014.22.005
International Journal of Respiration, Volume 34, Issue 22,2014, Pages 1757-1760, doi:10.3760/cma.j.issn.1673-436X.2014.22.018