International Journal of Respiration, Volume 34, Issue 4,2014, Pages 274-277, doi:10.3760/cma.j.issn.1673-436X.2014.04.009
International Journal of Respiration, Volume 34, Issue 4,2014, Pages 282-285, doi:10.3760/cma.j.issn.1673-436X.2014.04.011
International Journal of Respiration, Volume 34, Issue 4,2014, Pages 286-289, doi:10.3760/cma.j.issn.1673-436X.2014.04.012
International Journal of Respiration, Volume 34, Issue 4,2014, Pages 303-309, doi:10.3760/cma.j.issn.1673-436X.2014.04.016
International Journal of Respiration, Volume 34, Issue 4,2014, Pages 261-264, doi:10.3760/cma.j.issn.1673-436X.2014.04.006