NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 8,2004, Pages 637-641, doi:10.3760/j:issn:0376-2491.2004.08.007
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 8,2004, Pages 628-631, doi:10.3760/j:issn:0376-2491.2004.08.005
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 8,2004, Pages 663-666, doi:10.3760/j:issn:0376-2491.2004.08.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 8,2004, Pages 649-652, doi:10.3760/j:issn:0376-2491.2004.08.010
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 8,2004, Pages 642-645, doi:10.3760/j:issn:0376-2491.2004.08.008