NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 12,2009, Pages 820-822, doi:10.3760/cma.j.issn.0376-2491.2009.12.008
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 12,2009, Pages 800-804, doi:10.3760/cma.J.Issn.0376-2491.2009.12.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 12,2009, Pages 795-799, doi:10.3760/cma.j.issn.0376-2491.2009.12.002
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 12,2009, Pages 864, doi:10.3760/cma.j.issn.0376-2491.2009.12.019