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CHINESE JOURNAL OF SURGERY, Volume 41, Issue 7,2003, Pages 552-554, doi:10.3760/j:issn:0529-5815.2003.07.021
CHINESE JOURNAL OF SURGERY, Volume 41, Issue 7,2003, Pages 548-551, doi:10.3760/j:issn:0529-5815.2003.07.020