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CRTh2, CCR5, and Bcl-2 expression in CD4+lymphocytes. (A) Double positive (Th2/Bcl-2+ and Th1/Bcl-2+) populations are marked. Time-course analysis of the frequency of (B) Bcl-2+ Th1 cells and (C) Bcl-2+ Th2 cells before and after 1 year of SLIT. Statistically significant differences (Wilcoxon matched pairs test) are shown; ns, not significant.
