Report - RESEARCH ARTICLE Open Access Lack of MMP-9 ......B 208 110 52.9 197 163 82.7 206 138 67.0 C 155 93 60.0 137 99 72.3 138 77 55.8 D 131 78 59.5 132 104 78.8 131 78 59.5 Dukes’ stage

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