NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 19,2006, Pages 1327-1331, doi:10.3760/j:issn:0376-2491.2006.19.008
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 19,2006, Pages 1318-1322, doi:10.3760/j:issn:0376-2491.2006.19.006
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 19,2006, Pages 1305-1308, doi:10.3760/j:issn:0376-2491.2006.19.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 86, Issue 19,2006, Pages 1358-1360, doi:10.3760/j:issn:0376-2491.2006.19.016