C4B and Legg-Calve-Perthes disease: In addition to C1q, C4b, MBL, and complement factor B were significantly elevated in EGFR mutated pleural fluid, whereas the levels of other complement factors in the pleural fluid of LCP group were not significantly different between patients with wild type (WT) EGFR and mutated (MT) EGFR (Figure S6A-F).