Figure 2From: Intractable itch relieved by 4-phenylbutyrate therapy in patients with progressive familial intrahepatic cholestasis type 1Liver function testing before, during and after the course of 4PB therapy in the patients. Serum AST, ALT, GGT (A), total bilirubin, direct bilirubin, and bile acids (B) levels were monitored before, during and after the 4PB therapy. T-Bil, total bilirubin; D-Bil, direct bilirubin; BA, bile acids.Back to article page