Light micrograph of cultured MeT-5A cells conditioned with FCS (A), recombinant HGF (50 ng/ml) (B), serum (C) and peritoneal fluid (D) of patients with peritonitis, serum (E) and peritoneal fluid (F) of patients with peritonitis + anti-HGF antibody. Original magnifications: ×20 (A, E, F) and ×40 (B, C, D).