[1] Univ Vienna, A-1010 Vienna, Austria
[2] Virginia Commonwealth Univ Med Coll Virginia, Richmond, VA USA
[3] Univ N Carolina, Chapel Hill, NC 27515 USA
[4] Johns Hopkins Ctr Viral Hepatitis, Baltimore, MD USA
[5] Univ Dusseldorf, D-4000 Dusseldorf, Germany
[6] CHU Grenoble, F-38043 Grenoble, France
[7] Univ Campinas, Campinas, Spain
[8] Rush Presbyterian St Lukes Med Ctr, Chicago, IL USA
[9] Azienda Osped Univ Pisana, Pisa, Italy
[10] Hop Henri Mondor, F-94010 Creteil, France
[11] Hoffmann La Roche, Nutley, NJ USA