CHINESE JOURNAL OF PEDIATRIC SURGERY, Volume 28, Issue 5,2007, Pages 254-257, doi:10.3760/cma.j.issn.0253-3006.2007.05.009
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CHINESE JOURNAL OF PEDIATRIC SURGERY, Volume 28, Issue 5,2007, Pages 246-249, doi:10.3760/cma.j.issn.0253-3006.2007.05.007