SFRP1 and neoplasm: In line with our preceding results, the stable SFRP1 expression in HuH-6, HepT1 and HepG2 cells resulted in significantly impaired tumor cell growth (Fig. 2d, Supplementary Fig. 2c) and a strong decrease in colony formation (Fig. 2e, Supplementary Fig. 2d) and migration capacity (Fig. 2f) compared to control cells.