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Survival of immunocompetent mice injected i.p. with p210-expressing pre-B cells of various Arf genotypes. (A) Mice received equivalent numbers of p210+ cells of the indicated Arf genotypes. (B) Mice received Arf−/−, p210+ pre-B cells and were treated orally twice per day for the indicated interval (Rx, black bar) with vehicle alone (squares) or imatinib (triangles). (C) A similar experiment was performed with Arf+/−, p210+ donor cells.
