NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 17,2006, Pages 1220, doi:10.3760/j:issn:0376-2491.2006.17.025
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 17,2006, Pages 1187-1190, doi:10.3760/j:issn:0376-2491.2006.17.010
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 17,2006, Pages 1191-1195, doi:10.3760/j:issn:0376-2491.2006.17.011