Figure 4.

Numbers of FOXP3⁺ (A), CD3⁺ (B), CD4⁺ (C), or CD8⁺ (D) cells per high-power field were plotted against increasing postmenstrual age. Postmenstrual age was defined as gestational age plus chronological age in weeks. Ratios of FOXP3⁺ cells to CD4⁺ cells and FOXP3⁺ to CD8⁺ cells are shown in (E) and (F), respectively. Samples from small intestine and large intestine are shown as in Figure 2.