9Naito H, Hayashi S, Abe K. Rapid and specific genotyping systerm for hepatitis B virus corresponding to six major genotypes by PCR using type-specific primers[J]. J Clin Microbiol,2001,39(1): 362 -364.
10Orito E, Mizokami Y, Sakugawa H, et al. A case-control study for clinical and molecular biological differences between hepatitis B viruses of genotypes B and C. Japan HBV Genotype Research Group[J]. Hepatology, 2001,33 (2) :218-223.
