1. Department of Pathology; Beaujon Hospital; Clichy, 92110 France
2. Department of Pathology; Cochin hospital; Paris, 75014 France
3. Department of HPB Surgery and Liver Transplantation surgery; Beaujon Hospital; Clichy, 92110 France
4. Department of Molecular genetics; Cochin hospital; Paris, 75014 France
5. Department of Pathology; Cancer Institute; Toulouse, 31110 France