Additional file 1.

Figure S1. Tumorigenic efficacies of the hepatoma sphere-forming cells. The hepatoma parental cells and sphere-forming cells were injected into nude mice subcutaneously at the indicated cell concentrations. At day 30th after injection, mice were sacrificed and tumors were removed and compared in size.

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Cao et al. BMC Gastroenterology 2011 11:71   doi:10.1186/1471-230X-11-71