ERBB2 and cancer: The ADCP activity we observed with CD20+ or Her2+ cancer cells as targets and gmMφ as effectors is particularly noteworthy because, as had been reported earlier and confirmed here, cell surface expression of hFcγRIIIa on gmMφ is significantly lower than that of hFcγRIIa and FcγRI [Figure 3A,(36–38)].