International Journal of Respiration, Volume 35, Issue 19,2015, Pages 1475-1478, doi:10.3760/cma.j.issn.1673-436X.2015.19.009
International Journal of Respiration, Volume 35, Issue 19,2015, Pages 1471-1474, doi:10.3760/cma.j.issn.1673-436X.2015.19.008
International Journal of Respiration, Volume 35, Issue 19,2015, Pages 1488-1492, doi:10.3760/cma.j.issn.1673-436X.2015.19.012
International Journal of Respiration, Volume 35, Issue 19,2015, Pages 1502-1505, doi:10.3760/cma.j.issn.1673-436X.2015.19.016
International Journal of Respiration, Volume 35, Issue 19,2015, Pages 1506-1509, doi:10.3760/cma.j.issn.1673-436X.2015.19.017