1Chan HL, Tsang SW, Liew CT, et al. Viral genotype and hepatitis B virus DNA levels are correlated with histological liver damage in HBeAg-negative chronic hepatitis B virus infection. Am J Gastroenterol, 2002, 97: 406-412.
2Orito E, Ichida T, Sakugawa H, et al. Geograph!c distribution ofhepatitis B virus (HBV) genotype in patients with chronic HBV infection in Japan. Hepatology, 2001, 34: 590-594.
3Thakur V, Guptan RC, Kazim SN, et al. Profile, spectrum and significance of HBV genotypes in chronic liver disease patients in the Indian subcontinent. J Gastroenterol Hepatol, 2002, 17: 165-170.
4Orito E, Mizokami M, Sakugawa H, et al. A case-countrol study for clinical and molecular biological differences between hepatitis B viruses of genotypes B and C Japan HBV Geneotype Research Group.Hepatology, 2001, 33: 218-223.