NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 1,2009, Pages 25-28, doi:10.3760/cma.j.issn.0376-2491.2009.01.007
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 1,2009, Pages 33-36, doi:10.3760/cma.j.issn.0376-2491.2009.01.009
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 1,2009, Pages 17-20, doi:10.3760/cma.j.issn.0376-2491.2009.01.005
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 1,2009, Pages 54-58, doi:10.3760/cma.j.issn.0376-2491.2009.01.014