MethodsPrimary human insulinoma cells were isolated by using collagenase type p, and then purified by repeatedly selective cell culture.

方法原代分离人胰岛素瘤细胞，经多次筛选培养进行纯化。

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The thickness of peritumor low-density band was associated with lymph node metastasis (P< 0.01), histologic type (P<0.001) and tumor location (P<0.05).

瘤周低密度带厚度与淋巴结转移（P<0.01）、组织学类型（P<0.001）及肿瘤部位（P<0.05）均密切相关。

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The thickness of peritumor low-density band was associated with lymph node metastasis (P< 0.01), histologic type (P<0.001) and tumor location (P<0.05).

瘤周低密度带厚度与淋巴结转移（P<0.01）、组织学类型（P<0.001）及肿瘤部位（P<0.05）均密切相关。

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