Comparative Kaplan Meier survival curve for MiR-155 transgenic mice. (A) Survival of FVB and C57BL/6 MiR-155 transgenics compared with their wild-type counterparts, showing shorter lifespan for the transgenic mice. (B) Survival of transplanted FVB mice compared with the wild-type controls; all transplanted mice were dead after 6 weeks, whereas all the wild-type controls were alive.