Surface expression of VLA-4 and CX3CR1 is increased in bone marrow T cells of ITP patients. Flow cytometric analysis of VLA-4 and CX3CR1 on CD3⁺ T cells in peripheral blood (A,B) and bone marrow (C,D) from ITP patients (n = 6) and controls (n = 8). Data are presented as means (± SEM).