M Mayumi

Hepatitis B viruses with precore region defects prevail in persistently infected hosts along with seroconversion to the antibody against e antigen

F Tsuda, H. Okamoto, F. Tsuda, 1990, Journal of virology.

A novel DNA virus (TTV) associated with elevated transaminase levels in posttransfusion hepatitis of unknown etiology.

T. Nishizawa, H. Okamoto, Y. Miyakawa, 1997, Biochemical and biophysical research communications.

Hepatitis B virus with mutations in the core promoter for an e antigen-negative phenotype in carriers with antibody to e antigen

F Tsuda, H. Okamoto, F. Tsuda, 1994, Journal of virology.

The entire nucleotide sequences of three hepatitis C virus isolates in genetic groups 7-9 and comparison with those in the other eight genetic groups.

F Tsuda, H. Okamoto, F. Tsuda, 1998, The Journal of general virology.