NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 9,2009, Pages 610-613, doi:10.3760/cma.j.issn.0376-2491.2009.09.008
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 9,2009, Pages 638-640, doi:10.3760/cma.j.issn.0376-2491.2009.09.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 9,2009, Pages 587-591, doi:10.3760/cma.j.issn.0376-2491.2009.09.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 9,2009, Pages 606-609, doi:10.3760/cma.j.issn.0376-2491.2009.09.007