CD19 and diabetes mellitus: The lymphocyte counts and percentages (Fig. 7a, b), CD3+ cell counts (Fig. 8a), CD3+ CD4+ cell counts (Fig. 8c), CD3+ CD8+ cell counts (Fig. 8e), B(CD19+) cell counts (Fig. 9a) were the lowest in patients in the severe DM subgroup (all P < 0.05).