- Hepatitis B virus DNA in patients with chronic liver disease and negative tests for hepatitis B surface antigen. Bréchot, C., Degos, F., Lugassy, C., Thiers, V., Zafrani, S., Franco, D., Bismuth, H., Trépo, C., Benhamou, J.P., Wands, J. N. Engl. J. Med. (1985)