[1] Univ Palermo, Acad Dept Med, Palermo, Italy
[2] IRCCS San Matteo Univ Hosp Fdn, Pavia, Italy
[3] Fdn IRCCS Osped Maggiore Policlin, Milan, Italy
[4] Univ Aix Marseille 2, CHU Timon, Marseille, France
[5] Bayer Schering Pharma, Milan, Italy
[6] Bayer HealthCare Pharmaceut, West Haven, CT USA
[7] Bayer Schering Pharma, Wuppertal, Germany
[8] Barcelona Clin, Liver Canc Grp, Barcelona, Spain