Detection of human B cells in organs of NOD/SCID mice via immunohistochemistry.

Exemplary analysis. - negative; + only single cells are positive; ++ more than one cell per high power field.示例分析（Exemplary analysis）：- 阴性（negative）；+：仅单个细胞呈阳性；++：每个高倍视野（high power field）内存在多于一个阳性细胞。