CXCL8 and telomere syndrome: In addition, increased serum levels of interleukin 6 (IL-6), receptors for TNF (TNF-RI and TNF-RII), interleukin 2 receptor α (IL-2Rα), interleukin 10 (IL-10), macrophage-colony stimulating factor (M-CSF), and interleukin-8 (IL-8) were also found in STS patients [45,70,71].