International Journal of Respiration, Volume 34, Issue 11,2014, Pages 801-804, doi:10.3760/cma.j.issn.1673-436X.2014.11.001
International Journal of Respiration, Volume 34, Issue 11,2014, Pages 821-826, doi:10.3760/cma.j.issn.1673-436X.2014.11.006
International Journal of Respiration, Volume 34, Issue 11,2014, Pages 827-830, doi:10.3760/cma.j.issn.1673-436X.2014.11.007
International Journal of Respiration, Volume 34, Issue 11,2014, Pages 845-848, doi:10.3760/cma.j.issn.1673-436X.2014.11.012
International Journal of Respiration, Volume 34, Issue 11,2014, Pages 838-841, doi:10.3760/cma.j.issn.1673-436X.2014.11.010