IL6 and hematocrit: Similar results were also reported by Zivancevic-Simonovic et al., who reported that PTC patients with HT produced significantly higher concentrations of Interleukin 4 (IL-4), IL-6, Interleukin 9 (IL-9), Interleukin 13 (IL-13), and Interferon-gamma (IFN-γ) than PTC patients without HT [68].