NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 22,2009, Pages 1519-1520, doi:10.3760/cma.j.issn.0376-2491.2009.22.004
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 22,2009, Pages 1549-1552, doi:10.3760/cma.j.issn.0376-2491.2009.22.013
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 22,2009, Pages 1532, doi:10.3760/cma.j.issn.0376-2491.2009.22.008
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 22,2009, Pages 1521-1524, doi:10.3760/cma.j.issn.0376-2491.2009.22.005