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Changes in femoral hematopoietic populations during MLL-ENL leukemia development. Immunohistochemistry of GFP+ leukemic cells (brown cells) in diaphysis of 129/Sv mice 20 days after injection of 1,000 GFP+ leukemic cells. The three pictures show a leukemic cluster enlarged 10, 20 and 40 times, respectively (discontinued black line). Vessels (V) are delimited by black dot lines.
