NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 6,2008, Pages 374-377, doi:10.3321/j.issn:0376-2491.2008.06.005
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 6,2008, Pages 361-362, doi:10.3321/j.issn:0376-2491.2008.06.001
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 6,2008, Pages 383-386, doi:10.3321/j.issn:0376-2491.2008.06.007
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 6,2008, Pages 365-368, doi:10.3321/j.issn:0376-2491.2008.06.003