INTERNATIONAL JOURNAL OF RESPIRATION, Volume 31, Issue 2,2011, Pages 125-128, doi:10.3760/cma.j.issn.1673-436X.2011.002.012
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 31, Issue 2,2011, Pages 129-133, doi:10.3760/cma.j.issn.1673-436X.2011.002.013
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 31, Issue 2,2011, Pages 116-119, doi:10.3760/cma.j.issn.1673-436X.2011.002.010
INTERNATIONAL JOURNAL OF RESPIRATION, Volume 31, Issue 2,2011, Pages 103-105, doi:10.3760/cma.j.issn.1673-436X.2011.002.006