Typing hepatitis B virus by homology in nucleotide sequence: comparison of surface antigen subtyes .2 Okamoto H,Tsuda F,Sakugawa H,et al. J Gen Virol . 1988
Typing hepatitis B virus by homology in nucleotide sequence: comparison of surface antigen subtyes .2 Okamoto H,Tsuda F,Sakugawa H,et al. J Gen Virol . 1988