International Journal of Respiration, Volume 32, Issue 1,2012, Pages 10-13, doi:10.3760/cma.j.issn.1673-436X.2012.001.003
International Journal of Respiration, Volume 32, Issue 1,2012, Pages 22-25, doi:10.3760/cma.j.issn.1673-436X.2012.001.006
International Journal of Respiration, Volume 32, Issue 1,2012, Pages 40-42, doi:10.3760/cma.j.issn.1673-436X.2012.001.010
International Journal of Respiration, Volume 32, Issue 1,2012, Pages 70-72, doi:10.3760/cma.j.issn.1673-436X.2012.001.018