International Journal of Respiration, Volume 38, Issue 22,2018, Pages 1708-1712, doi:10.3760/cma.j.issn.1673-436X.2018.22.007
International Journal of Respiration, Volume 38, Issue 22,2018, Pages 1758-1760, doi:10.3760/cma.j.issn.1673-436X.2018.22.017
International Journal of Respiration, Volume 38, Issue 22,2018, Pages 1689-1693, doi:10.3760/cma.j.issn.1673-436X.2018.22.003
International Journal of Respiration, Volume 38, Issue 22,2018, Pages 1752-1757, doi:10.3760/cma.j.issn.1673-436X.2018.22.016
International Journal of Respiration, Volume 38, Issue 22,2018, Pages 1681-1684, doi:10.3760/cma.j.issn.1673-436X.2018.22.001