Allogeneic CLP cotransplantation increases absolute numbers of splenic CD4⁺ and CD8+ cells. Splenic CD4⁺ count after allogeneic transplantation of 500 LT-HSCs (•) or 500 LT-HSCs and 3000 CLPs (○); splenic CD8⁺ count after transplantation of 500 LT-HSCs (•) or 500 LT-HSCs and 3000 CLPs (□). Data represent mean ± SD (n = 5-9 in each group per time point). Statistically significant differences are indicated. *P = .01 (• versus ○), *P = .008, **P = .01, ***P = .01 (• versus □).