International Journal of Respiration, Volume 38, Issue 11,2018, Pages 807-811, doi:10.3760/cma.j.issn.1673-436X.2018.11.002
International Journal of Respiration, Volume 38, Issue 11,2018, Pages 860-865, doi:10.3760/cma.j.issn.1673-436X.2018.11.011
International Journal of Respiration, Volume 38, Issue 11,2018, Pages 801-806, doi:10.3760/cma.j.issn.1673-436X.2018.11.001
International Journal of Respiration, Volume 38, Issue 11,2018, Pages 820-825, doi:10.3760/cma.j.issn.1673-436X.2018.11.004
International Journal of Respiration, Volume 38, Issue 11,2018, Pages 844-848, doi:10.3760/cma.j.issn.1673-436X.2018.11.008