International Journal of Respiration, Volume 39, Issue 22,2019, Pages 1692-1696, doi:10.3760/cma.j.issn.1673-436X.2019.22.003
International Journal of Respiration, Volume 39, Issue 22,2019, Pages 1707-1711, doi:10.3760/cma.j.issn.1673-436X.2019.22.006
International Journal of Respiration, Volume 39, Issue 22,2019, Pages 1756-1760, doi:10.3760/cma.j.issn.1673-436X.2019.22.016
International Journal of Respiration, Volume 39, Issue 22,2019, Pages 1687-1691, doi:10.3760/cma.j.issn.1673-436X.2019.22.002
International Journal of Respiration, Volume 39, Issue 22,2019, Pages 1681-1686, doi:10.3760/cma.j.issn.1673-436X.2019.22.001