Blood parameters.

Evolution in platelet numbers (A), leukocyte numbers (B), and hematocrit (C) in mice undergoing transplantation with WT (●) or TGF-β1^−/− (■) virus-infected hematopoietic cells. Each point represents the mean ± SD of 12 to 14 animals, with the exception that only 6 TGF-β1^−/− animals were analyzed at week 16. Results of statistical analysis with the 2-tailed Student t test: WT versus TGF-β1^−/−,^★P < .05 and^★★P < .001.