NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 13,2008, Pages 889-891, doi:10.3321/j.issn:0376-2491.2008.13.007
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 13,2008, Pages 892-897, doi:10.3321/j.issn:0376-2491.2008.13.008
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 13,2008, Pages 919-922, doi:10.3321/j.issn:0376-2491.2008.13.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 88, Issue 13,2008, Pages 871-875, doi:10.3321/j.issn:0376-2491.2008.13.003