International Journal of Respiration, Volume 39, Issue 20,2019, Pages 1576-1580, doi:10.3760/cma.j.issn.1673-436X.2019.20.012
International Journal of Respiration, Volume 39, Issue 20,2019, Pages 1566-1571, doi:10.3760/cma.j.issn.1673-436X.2019.20.010
International Journal of Respiration, Volume 39, Issue 20,2019, Pages 1581-1585, doi:10.3760/cma.j.issn.1673-436X.2019.20.013
International Journal of Respiration, Volume 39, Issue 20,2019, Pages 1562-1565, doi:10.3760/cma.j.issn.1673-436X.2019.20.009
International Journal of Respiration, Volume 39, Issue 20,2019, Pages 1592-1596, doi:10.3760/cma.j.issn.1673-436X.2019.20.015