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Effect of IFNγ on in vitro proliferation of AML cells incubated in transwell culture together with either microvascular endothelial cells (EC), HFL1 fibroblasts (FB), Cal72 osteoblastic sarcoma cells (OB) or normal bone marrow stromal cells (BMSC). The figure compares leukaemia cell proliferation for cultures with (+) and without (−) IFNγ 50 ng/ml. Only those samples showing detectable proliferation (i.e. >1,000 cpm) for at least one of the in vitro models (+/−) are presented
