Patient-based health-related quality of life in different stages of chronic hepatitis C: Uwe Siebert, Harvard Sch of Public Health, Boston, MA, and Univ of Munich, Munich Germany; Ulrike Ravens-Sieberer, Robert Koch Institute, Berlin Germany; Wolfgang Greiner, University of Hanover, Hanover Germany; Gaby Sroczynski, Harvard School of Public Health, Boston, MA; John B Wong, Tufts University School of Medicine, Boston, MA; Karen M Kuntz, Harvard School of Public Health, Boston, MA; Birgit Kallinowski, University Hospital of Heidelberg, Heidelberg Germany; J.-Matthias Graf von der Schulenburg, University of Hanover, Hanover Germany; Monika Bullinger, University of Hamburg, Hamburg Germany; Siegbert Rossol, Univ Hosp of Mannheim, Mannheim, Germany, on behalf of the German Hepatitis C Model (GEHMO) Group