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The relation of CXCL12 and CXCR7 expression. A: Correlation analysis of CXCL12 expression in lymph nodes and CXCR7 expression in gastric cancer; B: Correlation analysis of CXCL12 expression in liver tissue and CXCR7 expression in gastric cancer. aP < 0.05, between the two groups. 1: The express of CXCL12 in lymph nodes with metastasis; 2: The express of CXCR7 in primary gastric cancer tissues
