Kinetics of serum tumor necrosis factor and transforming growth factor levels in chronic hepatitis C patients with minimal fibrosis are markers of progression of liver disease: Manuela G Neuman, Sunnybrook & Women's College HSC, Toronto, ON Canada; Jean-Pierre Benhamou, Hospital Beaujon, Clichy France; Izabella M Malkiewicz, Sunnybrook & Women's College HSC, Toronto, ON Canada; Dominique C Valla, Hospital Beaujon, Clichy France; Gady G Katz, Sunnybrook & Women's College HSC, Toronto, ON Canada; Raoudha Akremi, Michelle Martinot-Peignoux, Tarik Asselah, Dominique Cazals, Claude Degott, Hospital Beaujon, Clichy France; Neil H Shear, Sunnybrook & Women's College HSC, Toronto, ON Canada; Patrick Marcellin, Hospital Beaujon, Clichy France