IL6 and pulmonary fibrosis: But when using 10 Gy WTI with carbon ions (C-Ions), another radiation quality, and focusing on the fibrotic phase the same group showed that IL-6−/− mice had reduced levels of pulmonary fibrosis compared to irradiated C57BL/6 WT mice at 24 weeks post-irradiation pointing pro-fibrotic actions of IL6 during the chronic pathological state [221].