CD44 and hydrops fetalis: A further detailed analysis of the distribution of CD4+ AT2R+ T cells within CD4+ CD44+ CD62L− or CD4+ CD44+ CD62L+ T cell subsets (Fig.4A and B) showed that a significant decrease of blood CD4+ AT2R+ T cells in patients with HF was exclusively assigned to the CD4+ CD44+ CD62L− T cell subset, a known activated T cell fraction located mainly at inflammatory sites 22.