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Fig. 4. Effects of bryostatin-1 and GM-CSF on the morphology of AML blasts. Isolated AML blasts were incubated for 120 h in the absence (Control) or presence of bryostatin-1 (10-8 M) with or without GM-CSF (200 units/ml). Results represent Wright-Giemsa stained cytospin preparations from a representative patient. x400.