International Journal of Respiration, Volume 38, Issue 13,2018, Pages 996-1000, doi:10.3760/cma.j.issn.1673-436X.2018.13.008
International Journal of Respiration, Volume 38, Issue 13,2018, Pages 968-971, doi:10.3760/cma.j.issn.1673-436X.2018.13.002
International Journal of Respiration, Volume 38, Issue 13,2018, Pages 1021-1024, doi:10.3760/cma.j.issn.1673-436X.2018.13.013
International Journal of Respiration, Volume 38, Issue 13,2018, Pages 983-986, doi:10.3760/cma.j.issn.1673-436X.2018.13.005