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Tumor biodistribution of 89Zr-IgG and 89Zr-anti-CD20 antibodies at day 7 in mice with Raji xenografts, normalized to blood, muscle, liver, or bone. Obi = obinutuzumab; Ofa = ofatumumab; Rtx = rituximab; Tos = tositumomab. Data are mean ± SD. Differences between normalized uptake levels are present at P < 0.05 if there is no shared italicized letter, as analyzed by 1-way ANOVA with Tukey test.
