International Journal of Respiration, Volume 39, Issue 7,2019, Pages 500-503, doi:10.3760/cma.j.issn.1673-436X.2019.07.004
International Journal of Respiration, Volume 39, Issue 7,2019, Pages 530-533, doi:10.3760/cma.j.issn.1673-436X.2019.07.011
International Journal of Respiration, Volume 39, Issue 7,2019, Pages 547-551, doi:10.3760/cma.j.issn.1673-436X.2019.07.015
International Journal of Respiration, Volume 39, Issue 7,2019, Pages 487-494, doi:10.3760/cma.j.issn.1673-436X.2019.07.002
International Journal of Respiration, Volume 39, Issue 7,2019, Pages 556-560, doi:10.3760/cma.j.issn.1673-436X.2019.07.017