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CHINESE JOURNAL OF SURGERY, Volume 42, Issue 15,2004, Pages 904-907, doi:10.3760/j.issn.0529-5815.2004.15.003
CHINESE JOURNAL OF SURGERY, Volume 42, Issue 15,2004, Pages 908-910, doi:10.3760/j.issn.0529-5815.2004.15.004