2Maddrey WC. Hepatitis B: an important public health issue [ J ]. J Med Virol, 2000, 61 : 362 - 6.
3Lin CL, Liao LY, Liu CJ. Hepatitis B genotypes and precore/basal core promoter mutants in HBeAg- nepative chronic hepatitis B[J]. J Gastroenterol, 2002,37(4) : 283 -7.
4Chon CY, Han KH, Lee KS, et al. Pefitoneoscopic liver biopsy findings in asymptomatic chronic HBsAg carrier with normal liver function tests and no hepatomegsly[J]. Yonsei Med J, 1996, 37: 295 - 301.
5Agalar C, Diri C, Usubutun S, et al. The role of HBVDNA and liver histopathology in HBsAg carrier [ J ]. Hepato - gastroenterology, 1997,44: 1196-9.
6Bravo AA, Sheth S G, Chopla S. Livel biopsy[J]. N Engl S Med, 2001,344(1): 495 -500.