Longitudinal analysis of LPLs in 4 HIV-infected patients at the beginning (pre-ART) and during HAART. (A) CD4⁺ LPLs per 10 hpf, (B) FOXP3⁺ LPLs per 10 hpf, and (C) FOXP3⁺ T cells in percent of CD4⁺ LPLs. Clinical characteristics of the patients are provided in Table 2. Patient B (○) had already been treated by HAART at the first endoscopy for 8 weeks, while the other patients were initially treatment naive.